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Network Working Group                        Internet Architecture BoardRequest for Comments: 2400                                     J. PostelObsoletes:2300,2200,2000,1920,1880,                     J. Reynolds1800,1780,1720,1610,1600,1540,1500,1410,                  Editors1360, 1280, 1250, 1200, 1140, 1130, 1100, 1083            September 1998STD: 1Category: Standards TrackINTERNET OFFICIAL PROTOCOL STANDARDSStatus of this Memo   This memo describes the state of standardization of protocols used in   the Internet as determined by the Internet Architecture Board (IAB).   This memo is an Internet Standard.  Distribution of this memo is   unlimited.Copyright Notice   Copyright (C) The Internet Society (1998).  All Rights Reserved.Table of Contents   Introduction . . . . . . . . . . . . . . . . . . . . . . . . .21.  The Standardization Process  . . . . . . . . . . . . . . .32.  The Request for Comments Documents . . . . . . . . . . . .53.  Other Reference Documents  . . . . . . . . . . . . . . . .63.1.  Assigned Numbers . . . . . . . . . . . . . . . . . . . .63.2.  Gateway Requirements . . . . . . . . . . . . . . . . . .63.3.  Host Requirements  . . . . . . . . . . . . . . . . . . .63.4.  The MIL-STD Documents  . . . . . . . . . . . . . . . . .64.  Explanation of Terms . . . . . . . . . . . . . . . . . . .74.1.  Definitions of Protocol State (Maturity Level) . . . . .84.1.1.  Standard Protocol  . . . . . . . . . . . . . . . . . .84.1.2.  Draft Standard Protocol  . . . . . . . . . . . . . . .84.1.3.  Proposed Standard Protocol . . . . . . . . . . . . . .84.1.4.  Experimental Protocol  . . . . . . . . . . . . . . . .84.1.5.  Informational Protocol . . . . . . . . . . . . . . . .94.1.6.  Historic Protocol  . . . . . . . . . . . . . . . . . .94.2.  Definitions of Protocol Status (Requirement Level) . . .94.2.1.  Required Protocol  . . . . . . . . . . . . . . . . . .94.2.2.  Recommended Protocol . . . . . . . . . . . . . . . . .94.2.3.  Elective Protocol  . . . . . . . . . . . . . . . . . .94.2.4.  Limited Use Protocol . . . . . . . . . . . . . . . . .94.2.5.  Not Recommended Protocol . . . . . . . . . . . . . . .95.  The Standards Track  . . . . . . . . . . . . . . . . . . .10Internet Architecture Board Standards Track                     [Page 1]

RFC 2400                   Internet Standards             September 19985.1.  The RFC Processing Decision Table  . . . . . . . . . . .105.2.  The Standards Track Diagram  . . . . . . . . . . . . . .116.  The Protocols  . . . . . . . . . . . . . . . . . . . . . .136.1.  Recent Changes . . . . . . . . . . . . . . . . . . . . .136.1.1.  New RFCs . . . . . . . . . . . . . . . . . . . . . . .136.1.2.  Other Changes  . . . . . . . . . . . . . . . . . . . .206.2.  Standard Protocols . . . . . . . . . . . . . . . . . . .216.3.  Network-Specific Standard Protocols  . . . . . . . . . .236.4.  Draft Standard Protocols . . . . . . . . . . . . . . . .246.5.  Proposed Standard Protocols  . . . . . . . . . . . . . .266.6.  Telnet Options . . . . . . . . . . . . . . . . . . . . .336.7.  Experimental Protocols . . . . . . . . . . . . . . . . .356.8.  Informational Protocols  . . . . . . . . . . . . . . . .386.9.  Historic Protocols . . . . . . . . . . . . . . . . . . .406.10  Obsolete Protocols . . . . . . . . . . . . . . . . . . .417.  Contacts . . . . . . . . . . . . . . . . . . . . . . . . .427.1.  IAB, IETF, and IRTF Contacts . . . . . . . . . . . . . .427.1.1.  Internet Architecture Board (IAB) Contact  . . . . . .427.1.2.  Internet Engineering Task Force (IETF) Contact . . . .427.1.3.  Internet Research Task Force (IRTF) Contact  . . . . .437.2.  Internet Assigned Numbers Authority (IANA) Contact . . .447.3.  Request for Comments Editor Contact  . . . . . . . . . .457.4.  Network Information Center Contact . . . . . . . . . . .457.5.  Sources for Requests for Comments  . . . . . . . . . . .468.  Security Considerations  . . . . . . . . . . . . . . . . .469.  Author's Address . . . . . . . . . . . . . . . . . . . . .4610. Full Copyright Statement . . . . . . . . . . . . . . . . .47Introduction   A discussion of the standardization process and the RFC document   series is presented first, followed by an explanation of the terms.   Sections6.2 -6.10 contain the lists of protocols in each stage of   standardization.  Finally, there are pointers to references and   contacts for further information.   This memo is intended to be issued every one hundred RFCs; please be   sure the copy you are reading is current.  Current copies may be   obtained from the Requests for Comments Editor (RFC-EDITOR) or from   the Internet Assigned Numbers Authority (IANA) (see the contact   information at the end of this memo).   SeeSection 6.1 for a description of recent changes.  In the official   lists in sections6.2 -6.10, an asterisk (*) next to a protocol   denotes that it is new to this document or has been moved from one   protocol level to another, or differs from the previous edition of   this document.Internet Architecture Board Standards Track                     [Page 2]

RFC 2400                   Internet Standards             September 19981.  The Standardization Process   The Internet Architecture Board maintains this list of documents that   define standards for the Internet protocol suite.  SeeRFC-1601 for   the charter of the IAB andRFC-1160 for an explanation of the role   and organization of the IAB and its subsidiary groups, the Internet   Engineering Task Force (IETF) and the Internet Research Task Force   (IRTF).  Each of these groups has a steering group called the IESG   and IRSG, respectively.  The IETF develops these standards with the   goal of co-ordinating the evolution of the Internet protocols; this   co-ordination has become quite important as the Internet protocols   are increasingly in general commercial use.  The definitive   description of the Internet standards process is found inRFC-2026.   The majority of Internet protocol development and standardization   activity takes place in the working groups of the IETF.   Protocols which are to become standards in the Internet go through a   series of states or maturity levels (proposed standard, draft   standard, and standard) involving increasing amounts of scrutiny and   testing.  When a protocol completes this process it is assigned a STD   number (seeRFC-1311).  At each step, the Internet Engineering   Steering Group (IESG) of the IETF must make a recommendation for   advancement of the protocol.   To allow time for the Internet community to consider and react to   standardization proposals, a minimum delay of 6 months before a   proposed standard can be advanced to a draft standard and 4 months   before a draft standard can be promoted to standard.   It is general practice that no proposed standard can be promoted to   draft standard without at least two independent implementations (and   the recommendation of the IESG).  Promotion from draft standard to   standard generally requires operational experience and demonstrated   interoperability of two or more implementations (and the   recommendation of the IESG).   In cases where there is uncertainty as to the proper decision   concerning a protocol a special review committee may be appointed   consisting of experts from the IETF, IRTF and the IAB with the   purpose of recommending an explicit action.   Advancement of a protocol to proposed standard is an important step   since it marks a protocol as a candidate for eventual standardization   (it puts the protocol "on the standards track").  Advancement to   draft standard is a major step which warns the community that, unless   major objections are raised or flaws are discovered, the protocol is   likely to be advanced to standard.Internet Architecture Board Standards Track                     [Page 3]

RFC 2400                   Internet Standards             September 1998   Some protocols have been superseded by better ones or are otherwise   unused.  Such protocols are still documented in this memorandum with   the designation "historic".   Because it is useful to document the results of early protocol   research and development work, some of the RFCs document protocols   which are still in an experimental condition.  The protocols are   designated "experimental" in this memorandum.  They appear in this   report as a convenience to the community and not as evidence of their   standardization.   Other protocols, such as those developed by other standards   organizations, or by particular vendors, may be of interest or may be   recommended for use in the Internet.  The specifications of such   protocols may be published as RFCs for the convenience of the   Internet community.  These protocols are labeled "informational" in   this memorandum.   In addition to the working groups of the IETF, protocol development   and experimentation may take place as a result of the work of the   research groups of the Internet Research Task Force, or the work of   other individuals interested in Internet protocol development.  The   the documentation of such experimental work in the RFC series is   encouraged, but none of this work is considered to be on the track   for standardization until the IESG has made a recommendation to   advance the protocol to the proposed standard state.   A few protocols have achieved widespread implementation without the   approval of the IESG.  For example, some vendor protocols have become   very important to the Internet community even though they have not   been recommended by the IESG.  However, the IAB strongly recommends   that the standards process be used in the evolution of the protocol   suite to maximize interoperability (and to prevent incompatible   protocol requirements from arising).  The use of the terms   "standard", "draft standard", and "proposed standard" are reserved in   any RFC or other publication of Internet protocols to only those   protocols which the IESG has approved.   In addition to a state (like "Proposed Standard"), a protocol is also   assigned a status, or requirement level, in this document.  The   possible requirement levels ("Required", "Recommended", "Elective",   "Limited Use", and "Not Recommended") are defined inSection 4.2.   When a protocol is on the standards track, that is in the proposed   standard, draft standard, or standard state (seeSection 5), the   status shown inSection 6 is the current status.Internet Architecture Board Standards Track                     [Page 4]

RFC 2400                   Internet Standards             September 1998   Few protocols are required to be implemented in all systems; this is   because there is such a variety of possible systems, for example,   gateways, routers, terminal servers, workstations, and multi-user   hosts.  The requirement level shown in this document is only a one   word label, which may not be sufficient to characterize the   implementation requirements for a protocol in all situations.  For   some protocols, this document contains an additional status paragraph   (an applicability statement).  In addition, more detailed status   information may be contained in separate requirements documents (seeSection 3).2.  The Request for Comments Documents   The documents called Request for Comments (or RFCs) are the working   notes of the "Network Working Group", that is the Internet research   and development community.  A document in this series may be on   essentially any topic related to computer communication, and may be   anything from a meeting report to the specification of a standard.   Notice:      All standards are published as RFCs, but not all RFCs specify      standards.   Anyone can submit a document for publication as an RFC.  Submissions   must be made via electronic mail to the RFC Editor (see the contact   information at the end of this memo, and seeRFC 2223).   While RFCs are not refereed publications, they do receive technical   review from the task forces, individual technical experts, or the RFC   Editor, as appropriate.   The RFC series comprises a wide range of documents, ranging from   informational documents of general interests to specifications of   standard Internet protocols.  In cases where submission is intended   to document a proposed standard, draft standard, or standard   protocol, the RFC Editor will publish the document only with the   approval of the IESG.  For documents describing experimental work,   the RFC Editor will notify the IESG before publication, allowing for   the possibility of review by the relevant IETF working group or IRTF   research group and provide those comments to the author.  SeeSection5.1 for more detail.   Once a document is assigned an RFC number and published, that RFC is   never revised or re-issued with the same number.  There is never a   question of having the most recent version of a particular RFC.   However, a protocol (such as File Transfer Protocol (FTP)) may be   improved and re-documented many times in several different RFCs.  ItInternet Architecture Board Standards Track                     [Page 5]

RFC 2400                   Internet Standards             September 1998   is important to verify that you have the most recent RFC on a   particular protocol.  This "Internet Official Protocol Standards"   memo is the reference for determining the correct RFC for the current   specification of each protocol.   The RFCs are available from the RFC-EDITOR, and a number of other   sites.  For more information about obtaining RFCs, see Sections7.4   and 7.5.3.  Other Reference Documents   There are three other reference documents of interest in checking the   current status of protocol specifications and standardization.  These   are the Assigned Numbers, the Gateway Requirements, and the Host   Requirements.  Note that these documents are revised and updated at   different times; in case of differences between these documents, the   most recent must prevail.   Also, one should be aware of the MIL-STD publications on IP, TCP,   Telnet, FTP, and SMTP.  These are described inSection 3.4.3.1.  Assigned Numbers   The "Assigned Numbers" document lists the assigned values of the   parameters used in the various protocols.  For example, IP protocol   codes, TCP port numbers, Telnet Option Codes, ARP hardware types, and   Terminal Type names.  Assigned Numbers was most recently issued asRFC-1700.3.2.  Requirements for IP Version 4 Routers   This document reviews the specifications that apply to gateways and   supplies guidance and clarification for any ambiguities.   Requirements for IP Version 4 Routers isRFC-1812.3.3.  Host Requirements   This pair of documents reviews and updates the specifications that   apply to hosts, and it supplies guidance and clarification for any   ambiguities.  Host Requirements was issued asRFC-1122 andRFC-1123.3.4.  The MIL-STD Documents   The DoD MIL-STD Internet specifications are out of date and have been   discontinued.  The DoD's Joint Technical Architecture (JTA) lists the   current set of IETF STDs and RFCs that the DoD intends to use in all   new and upgraded Command, Control, Communications, Computers, and   Intelligence (C4I) acquisitions.  A copy of the JTA can be obtainedInternet Architecture Board Standards Track                     [Page 6]

RFC 2400                   Internet Standards             September 1998   fromhttp://www-jta.itsi.disa.mil.4.  Explanation of Terms   There are two independent categorization of protocols.  The first is   the "maturity level" or STATE of standardization, one of "standard",   "draft standard", "proposed standard", "experimental",   "informational" or "historic".  The second is the "requirement level"   or STATUS of this protocol, one of "required", "recommended",   "elective", "limited use", or "not recommended".   The status or requirement level is difficult to portray in a one word   label.  These status labels should be considered only as an   indication, and a further description, or applicability statement,   should be consulted.   When a protocol is advanced to proposed standard or draft standard,   it is labeled with a current status.   At any given time a protocol occupies a cell of the following matrix.   Protocols are likely to be in cells in about the following   proportions (indicated by the relative number of Xs).  A new protocol   is most likely to start in the (proposed standard, elective) cell, or   the (experimental, limited use) cell.                             S T A T U S                     Req   Rec   Ele   Lim   Not                   +-----+-----+-----+-----+-----+           Std     |  X  | XXX | XXX |     |     |       S           +-----+-----+-----+-----+-----+           Draft   |  X  |  X  | XXX |     |     |       T           +-----+-----+-----+-----+-----+           Prop    |     |  X  | XXX |     |     |       A           +-----+-----+-----+-----+-----+           Info    |     |     |     |     |     |       T           +-----+-----+-----+-----+-----+           Expr    |     |     |     | XXX |     |       E           +-----+-----+-----+-----+-----+           Hist    |     |     |     |     | XXX |                   +-----+-----+-----+-----+-----+   What is a "system"?      Some protocols are particular to hosts and some to gateways; a few      protocols are used in both.  The definitions of the terms below      will refer to a "system" which is either a host or a gateway (or      both).  It should be clear from the context of the particular      protocol which types of systems are intended.Internet Architecture Board Standards Track                     [Page 7]

RFC 2400                   Internet Standards             September 19984.1.  Definitions of Protocol State   Every protocol listed in this document is assigned to a "maturity   level" or STATE of standardization: "standard", "draft standard",   "proposed standard", "experimental", or "historic".   4.1.1.  Standard Protocol      The IESG has established this as an official standard protocol for      the Internet.  These protocols are assigned STD numbers (seeRFC-1311).  These are separated into two groups: (1) IP protocol and      above, protocols that apply to the whole Internet; and (2)      network-specific protocols, generally specifications of how to do      IP on particular types of networks.   4.1.2.  Draft Standard Protocol      The IESG is actively considering this protocol as a possible      Standard Protocol.  Substantial and widespread testing and comment      are desired.  Comments and test results should be submitted to the      IESG.  There is a possibility that changes will be made in a Draft      Standard Protocol before it becomes a Standard Protocol.   4.1.3.  Proposed Standard Protocol      These are protocol proposals that may be considered by the IESG      for standardization in the future.  Implementation and testing by      several groups is desirable.  Revision of the protocol      specification is likely.   4.1.4.  Experimental Protocol      A system should not implement an experimental protocol unless it      is participating in the experiment and has coordinated its use of      the protocol with the developer of the protocol.      Typically, experimental protocols are those that are developed as      part of an ongoing research project not related to an operational      service offering.  While they may be proposed as a service      protocol at a later stage, and thus become proposed standard,      draft standard, and then standard protocols, the designation of a      protocol as experimental may sometimes be meant to suggest that      the protocol, although perhaps mature, is not intended for      operational use.Internet Architecture Board Standards Track                     [Page 8]

RFC 2400                   Internet Standards             September 1998   4.1.5.  Informational Protocol      Protocols developed by other standard organizations, or vendors,      or that are for other reasons outside the purview of the IESG, may      be published as RFCs for the convenience of the Internet community      as informational protocols.   4.1.6.  Historic Protocol      These are protocols that are unlikely to ever become standards in      the Internet either because they have been superseded by later      developments or due to lack of interest.4.2.  Definitions of Protocol Status      This document lists a "requirement level" or STATUS for each      protocol.  The status is one of "required", "recommended",      "elective", "limited use", or "not recommended".   4.2.1.  Required Protocol      A system must implement the required protocols.   4.2.2.  Recommended Protocol      A system should implement the recommended protocols.   4.2.3.  Elective Protocol      A system may or may not implement an elective protocol. The      general notion is that if you are going to do something like this,      you must do exactly this.  There may be several elective protocols      in a general area, for example, there are several electronic mail      protocols, and several routing protocols.   4.2.4.  Limited Use Protocol      These protocols are for use in limited circumstances.  This may be      because of their experimental state, specialized nature, limited      functionality, or historic state.   4.2.5.  Not Recommended Protocol      These protocols are not recommended for general use.  This may be      because of their limited functionality, specialized nature, or      experimental or historic state.Internet Architecture Board Standards Track                     [Page 9]

RFC 2400                   Internet Standards             September 19985.  The Standards Track   This section discusses in more detail the procedures used by the RFC   Editor and the IESG in making decisions about the labeling and   publishing of protocols as standards.5.1.  The RFC Processing Decision Table   Here is the current decision table for processing submissions by the   RFC Editor.  The processing depends on who submitted it, and the   status they want it to have.      +==========================================================+      |**************|               S O U R C E                 |      +==========================================================+      | Desired      |    IAB   |   IESG   |   IRSG   |  Other   |      | Status       |          |          |          |          |      +==========================================================+      |              |          |          |          |          |      | Standard     |  Bogus   |  Publish |  Bogus   |  Bogus   |      | or           |   (2)    |   (1)    |   (2)    |   (2)    |      | Draft        |          |          |          |          |      | Standard     |          |          |          |          |      +--------------+----------+----------+----------+----------+      |              |          |          |          |          |      |              |  Refer   |  Publish |  Refer   |  Refer   |      | Proposed     |   (3)    |   (1)    |   (3)    |   (3)    |      | Standard     |          |          |          |          |      |              |          |          |          |          |      +--------------+----------+----------+----------+----------+      |              |          |          |          |          |      |              |  Notify  |  Publish |  Notify  |  Notify  |      | Experimental |   (4)    |   (1)    |   (4)    |   (4)    |      | Protocol     |          |          |          |          |      |              |          |          |          |          |      +--------------+----------+----------+----------+----------+      |              |          |          |          |          |      | Information  |  Publish |  Publish |Discretion|Discretion|      | or Opinion   |   (1)    |   (1)    |   (5)    |   (5)    |      | Paper        |          |          |          |          |      |              |          |          |          |          |      +==========================================================+      (1) Publish.      (2) Bogus.  Inform the source of the rules.  RFCs specifying          Standard, or Draft Standard must come from the IESG, only.Internet Architecture Board Standards Track                    [Page 10]

RFC 2400                   Internet Standards             September 1998      (3) Refer to an Area Director for review by a WG.  Expect to see          the document again only after approval by the IESG.      (4) Notify both the IESG and IRSG.  If no concerns are raised in          two weeks then do Discretion (5), else RFC Editor to resolve          the concerns or do Refer (3).      (5) RFC Editor's discretion.  The RFC Editor decides if a review          is needed and if so by whom.  RFC Editor decides to publish or          not.   Of course, in all cases the RFC Editor can request or make minor   changes for style, format, and presentation purposes.   The IESG has designated the IESG Secretary as its agent for   forwarding documents with IESG approval and for registering concerns   in response to notifications (4) to the RFC Editor.  Documents from   Area Directors or Working Group Chairs may be considered in the same   way as documents from "other".5.2.  The Standards Track Diagram   There is a part of the STATUS and STATE categorization that is called   the standards track.  Actually, only the changes of state are   significant to the progression along the standards track, though the   status assignments may change as well.   The states illustrated by single line boxes are temporary states,   those illustrated by double line boxes are long term states.  A   protocol will normally be expected to remain in a temporary state for   several months (minimum six months for proposed standard, minimum   four months for draft standard).  A protocol may be in a long term   state for many years.   A protocol may enter the standards track only on the recommendation   of the IESG; and may move from one state to another along the track   only on the recommendation of the IESG.  That is, it takes action by   the IESG to either start a protocol on the track or to move it along.   Generally, as the protocol enters the standards track a decision is   made as to the eventual STATUS, requirement level or applicability   (elective, recommended, or required) the protocol will have, although   a somewhat less stringent current status may be assigned, and it then   is placed in the the proposed standard STATE with that status.  So   the initial placement of a protocol is into state 1.  At any time the   STATUS decision may be revisited.Internet Architecture Board Standards Track                    [Page 11]

RFC 2400                   Internet Standards             September 1998         |         +<----------------------------------------------+         |                                               ^         V    0                                          |    4   +-----------+                                   +===========+   |   enter   |-->----------------+-------------->|experiment |   +-----------+                   |               +=====+=====+                                   |                     |                                   V    1                |                             +-----------+               V                             | proposed  |-------------->+                        +--->+-----+-----+               |                        |          |                     |                        |          V    2                |                        +<---+-----+-----+               V                             | draft std |-------------->+                        +--->+-----+-----+               |                        |          |                     |                        |          V    3                |                        +<---+=====+=====+               V                             | standard  |-------------->+                             +=====+=====+               |                                                         |                                                         V    5                                                   +=====+=====+                                                   | historic  |                                                   +===========+   The transition from proposed standard (1) to draft standard (2) can   only be by action of the IESG and only after the protocol has been   proposed standard (1) for at least six months.   The transition from draft standard (2) to standard (3) can only be by   action of the IESG and only after the protocol has been draft   standard (2) for at least four months.   Occasionally, the decision may be that the protocol is not ready for   standardization and will be assigned to the experimental state (4).   This is off the standards track, and the protocol may be resubmitted   to enter the standards track after further work.  There are other   paths into the experimental and historic states that do not involve   IESG action.   Sometimes one protocol is replaced by another and thus becomes   historic, or it may happen that a protocol on the standards track is   in a sense overtaken by another protocol (or other events) and   becomes historic (state 5).Internet Architecture Board Standards Track                    [Page 12]

RFC 2400                   Internet Standards             September 19986.  The Protocols   Subsection 6.1 lists recent RFCs and other changes.  Subsections6.2   - 6.10 list the standards in groups by protocol state.6.1.  Recent Changes6.1.1.  New RFCs:      2428 - FTP Extensions for IPv6 and NATs             A Proposed Standard protocol.      2427 - Multiprotocol Interconnect over Frame Relay             A Standard protocol.      2426 - vCard MIME Directory Profile             A Proposed Standard protocol.      2425 - A MIME Content-Type for Directory Information             A Proposed Standard protocol.      2424 - Content Duration MIME Header Definition             A Proposed Standard protocol.      2423 - VPIM Voice Message MIME Sub-type Registration             A Proposed Standard protocol.      2422 - Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type             Registration             A Proposed Standard protocol.      2421 - Voice Profile for Internet Mail - version 2             A Proposed Standard protocol.      2420 - The PPP Triple-DES Encryption Protocol (3DESE)             A Proposed Standard protocol.Internet Architecture Board Standards Track                    [Page 13]

RFC 2400                   Internet Standards             September 1998      2419 - The PPP DES Encryption Protocol, Version 2 (DESE-bis)             A Proposed Standard protocol.      2418 - IETF Working Group Guidelines and Procedures             This is a Best Current Practices document and does not             specify any level of standard.      2417 - Definitions of Managed Objects for Multicast over UNI             3.0/3.1 based ATM Network             A Proposed Standard protocol.      2416 - When TCP Starts Up With Four Packets Into Only Three             Buffers             This is an information document and does not specify any             level of standard.      2415 - Simulation Studies of Increased Initial TCP Window Size             This is an information document and does not specify any             level of standard.      2414 - Increasing TCP's Initial Window             An Experimental protocol.      2413 - Dublin Core Metadata for Resource Discovery             This is an information document and does not specify any             level of standard.      2412 - Not yet issued.      2411 - Not yet issued.      2410 - Not yet issued.      2409 - Not yet issued.      2408 - Not yet issued.      2407 - Not yet issued.Internet Architecture Board Standards Track                    [Page 14]

RFC 2400                   Internet Standards             September 1998      2406 - Not yet issued.      2405 - Not yet issued.      2404 - Not yet issued.      2403 - Not yet issued.      2402 - Not yet issued.      2401 - Not yet issued.      2400 - This memo.      2399 - Not yet issued.      2398 - Some Testing Tools for TCP Implementors             This is an information document and does not specify any             level of standard.      2397 - The "data" URL scheme             A Proposed Standard protocol.      2396 - Uniform Resource Identifiers (URI): Generic Syntax             A Draft Standard protocol.      2395 - Not yet issued.      2394 - Not yet issued.      2393 - Not yet issued.      2392 - Content-ID and Message-ID Uniform Resource Locators             A Proposed Standard protocol.      2391 - Load Sharing using IP Network Address Translation (LSNAT)             This is an information document and does not specify any             level of standard.      2390 - Inverse Address Resolution Protocol             A Draft Standard protocol.Internet Architecture Board Standards Track                    [Page 15]

RFC 2400                   Internet Standards             September 1998      2389 - Feature negotiation mechanism for the File Transfer             Protocol             A Proposed Standard protocol.      2388 - Returning Values from Forms:  multipart/form-data             A Proposed Standard protocol.      2387 - The MIME Multipart/Related Content-type             A Proposed Standard protocol.      2386 - A Framework for QoS-based Routing in the Internet             This is an information document and does not specify any             level of standard.      2385 - Protection of BGP Sessions via the TCP MD5 Signature Option             A Proposed Standard protocol.      2384 - POP URL Scheme             A Proposed Standard protocol.      2383 - ST2+ over ATM Protocol Specification - UNI 3.1 Version             This is an information document and does not specify any             level of standard.      2382 - A Framework for Integrated Services and RSVP over ATM             This is an information document and does not specify any             level of standard.      2381 - Interoperation of Controlled-Load Service and Guaranteed             Service with ATM             A Proposed Standard protocol.      2380 - RSVP over ATM Implementation Requirements             A Proposed Standard protocol.Internet Architecture Board Standards Track                    [Page 16]

RFC 2400                   Internet Standards             September 1998      2379 - RSVP over ATM Implementation Guidelines             This is a Best Current Practices document and does not             specify any level of standard.      2378 - Not yet issued.      2377 - Not yet issued.      2376 - XML Media Types             This is an information document and does not specify any             level of standard.      2375 - IPv6 Multicast Address Assignments             This is an information document and does not specify any             level of standard.      2374 - An IPv6 Aggregatable Global Unicast Address Format             A Proposed Standard protocol.      2373 - IP Version 6 Addressing Architecture             A Proposed Standard protocol.      2372 - Transaction Internet Protocol - Requirements and             Supplemental Information             This is an information document and does not specify any             level of standard.      2371 - Transaction Internet Protocol Version 3.0             A Proposed Standard protocol.      2370 - The OSPF Opaque LSA Option             A Proposed Standard protocol.      2369 - The Use of URLs as Meta-Syntax for Core Mail List Commands             and their Transport through Message Header Field             A Proposed Standard protocol.Internet Architecture Board Standards Track                    [Page 17]

RFC 2400                   Internet Standards             September 1998      2368 - The mailto URL scheme             A Proposed Standard protocol.      2367 - PF_KEY Key Management API, Version 2             This is an information document and does not specify any             level of standard.      2366 - Definitions of Managed Objects for Multicast over UNI             3.0/3.1 based ATM Networks             A Proposed Standard protocol.      2365 - Administratively Scoped IP Multicast             This is a Best Current Practices document and does not             specify any level of standard.      2364 - PPP Over AAL             A Proposed Standard protocol.      2363 - PPP Over FUNI             A Proposed Standard protocol.      2362 - Protocol Independent Multicast-Sparse Mode (PIM-SM):             Protocol Specification             An Experimental protocol.      2361 - WAVE and AVI Codec Registries             This is an information document and does not specify any             level of standard.      2360 - Guide for Internet Standards Writers             This is a Best Current Practices document and does not             specify any level of standard.      2359 - IMAP4 UIDPLUS extension             A Proposed Standard protocol.Internet Architecture Board Standards Track                    [Page 18]

RFC 2400                   Internet Standards             September 1998      2358 - Definitions of Managed Objects for the Ethernet-like             Interface Types             A Proposed Standard protocol.      2357 - IETF Criteria for Evaluating Reliable Multicast Transport             and Application Protocols             This is an information document and does not specify any             level of standard.      2356 - Sun's SKIP Firewall Traversal for Mobile IP             This is an information document and does not specify any             level of standard.      2355 - TN3270 Enhancements             A Draft Standard protocol.      2354 - Options for Repair of Streaming Media             This is an information document and does not specify any             level of standard.      2353 - APPN/HPR in IP Networks APPN Implementers' Workshop Closed             Pages Document             This is an information document and does not specify any             level of standard.      2350 - Expectations for Computer Security Incident Response             This is a Best Current Practices document and does not             specify any level of standard.      2340 - Nortel's Virtual Network Switching (VNS) Overview             This is an information document and does not specify any             level of standard.      2336 - Classical IP and ARP over ATM to NHRP Transition             This is an information document and does not specify any             level of standard.Internet Architecture Board Standards Track                    [Page 19]

RFC 2400                   Internet Standards             September 19986.1.2.  Other Changes:   The following are changes to protocols listed in the previous   edition.      2073 - An IPv6 Provider-Based Unicast Address Format             Moved to Historic.      1884 - IP Version 6 Addressing Architecture             Moved to Historic.      0658 - Telnet Output Linefeed Disposition             Moved to Historic.      0657 - Telnet Output Vertical Tab Disposition Option             Moved to Historic.      0656 - Telnet Output Vertical Tabstops Option             Moved to Historic.      0655 - Telnet Output Formfeed Disposition Option             Moved to Historic.      0654 - Telnet Output Horizontal Tab Disposition Option             Moved to Historic.      0653 - Telnet Output Horizontal Tabstops Option             Moved to Historic.      0652 - Telnet Output Carriage-Return Disposition Option             Moved to Historic.Internet Architecture Board Standards Track                    [Page 20]

RFC 2400                   Internet Standards             September 19986.2.  Standard ProtocolsProtocol   Name                                      Status    RFC STD *========   =====================================     ======== ==== === =--------   Internet Official Protocol Standards      Req      2400   1--------   Assigned Numbers                          Req      1700   2--------   Host Requirements - Communications        Req      1122   3--------   Host Requirements - Applications          Req      1123   3IP         Internet Protocol                         Req       791   5            as amended by:----------------     IP Subnet Extension                     Req       950   5--------     IP Broadcast Datagrams                  Req       919   5--------     IP Broadcast Datagrams with Subnets     Req       922   5ICMP       Internet Control Message Protocol         Req       792   5IGMP       Internet Group Multicast Protocol         Rec      1112   5UDP        User Datagram Protocol                    Rec       768   6TCP        Transmission Control Protocol             Rec       793   7TELNET     Telnet Protocol                           Rec   854,855   8FTP        File Transfer Protocol                    Rec       959   9SMTP       Simple Mail Transfer Protocol             Rec       821  10SMTP-SIZE  SMTP Service Ext for Message Size         Rec      1870  10SMTP-EXT   SMTP Service Extensions                   Rec      1869  10MAIL       Format of Electronic Mail Messages        Rec       822  11CONTENT    Content Type Header Field                 Rec      1049  11NTPV2      Network Time Protocol (Version 2)         Rec      1119  12DOMAIN     Domain Name System                        Rec 1034,1035  13DNS-MX     Mail Routing and the Domain System        Rec       974  14SNMP       Simple Network Management Protocol        Rec      1157  15SMI        Structure of Management Information       Rec      1155  16Concise-MIB Concise MIB Definitions                  Rec      1212  16MIB-II     Management Information Base-II            Rec      1213  17NETBIOS    NetBIOS Service Protocols                 Ele 1001,1002  19ECHO       Echo Protocol                             Rec       862  20DISCARD    Discard Protocol                          Ele       863  21CHARGEN    Character Generator Protocol              Ele       864  22QUOTE      Quote of the Day Protocol                 Ele       865  23USERS      Active Users Protocol                     Ele       866  24DAYTIME    Daytime Protocol                          Ele       867  25TIME       Time Server Protocol                      Ele       868  26TFTP       Trivial File Transfer Protocol            Ele      1350  33TP-TCP     ISO Transport Service on top of the TCP   Ele      1006  35ETHER-MIB  Ethernet MIB                              Ele      1643  50PPP        Point-to-Point Protocol (PPP)             Ele      1661  51PPP-HDLC   PPP in HDLC Framing                       Ele      1662  51IP-SMDS    IP Datagrams over the SMDS Service        Ele      1209  52POP3       Post Office Protocol, Version 3           Ele      1939  53OSPF2      Open Shortest Path First Routing V2       Ele      2328  54IP-FR      Multiprotocol over Frame Relay            Ele      2427  55*Internet Architecture Board Standards Track                    [Page 21]

RFC 2400                   Internet Standards             September 1998[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Applicability Statements:   IGMP -- The Internet Architecture Board intends to move towards   general adoption of IP multicasting, as a more efficient solution   than broadcasting for many applications.  The host interface has been   standardized inRFC-1112; however, multicast-routing gateways are in   the experimental stage and are not widely available.  An Internet   host should support all ofRFC-1112, except for the IGMP protocol   itself which is optional; seeRFC-1122 for more details.  Even   without IGMP, implementation ofRFC-1112 will provide an important   advance: IP-layer access to local network multicast addressing.  It   is expected that IGMP will become recommended for all hosts and   gateways at some future date.   SMI, MIB-II SNMP -- The Internet Architecture Board recommends that   all IP and TCP implementations be network manageable.  At the current   time, this implies implementation of the Internet MIB-II (RFC-1213),   and at least the recommended management protocol SNMP (RFC-1157).   RIP -- The Routing Information Protocol (RIP) is widely implemented   and used in the Internet.  However, both implementors and users   should be aware that RIP has some serious technical limitations as a   routing protocol.  The IETF is currently devpeloping several   candidates for a new standard "open" routing protocol with better   properties than RIP.  The IAB urges the Internet community to track   these developments, and to implement the new protocol when it is   standardized; improved Internet service will result for many users.   TP-TCP -- As OSI protocols become more widely implemented and used,   there will be an increasing need to support interoperation with the   TCP/IP protocols.  The Internet Engineering Task Force is formulating   strategies for interoperation.RFC-1006 provides one interoperation   mode, in which TCP/IP is used to emulate TP0 in order to support OSI   applications.  Hosts that wish to run OSI connection-oriented   applications in this mode should use the procedure described inRFC-1006.  In the future, the IAB expects that a major portion of the   Internet will support both TCP/IP and OSI (inter-)network protocols   in parallel, and it will then be possible to run OSI applications   across the Internet using full OSI protocol "stacks".   OSPF --RFC 1370 is an applicability statement for OSPF.Internet Architecture Board Standards Track                    [Page 22]

RFC 2400                   Internet Standards             September 19986.3.  Network-Specific Standard ProtocolsAll Network-Specific Standards have Elective status.Protocol   Name                                    State    RFC   STD *========   =====================================   =====   =====  === =IP-ATM     Classical IP and ARP over ATM            Prop   2225ATM-ENCAP  Multiprotocol Encapsulation over ATM     Prop   1483IP-TR-MC   IP Multicast over Token-Ring LANs        Prop   1469IP-FDDI    Transmission of IP and ARP over FDDI Net Std    1390    36IP-X.25    X.25 and ISDN in the Packet Mode         Draft  1356ARP        Address Resolution Protocol              Std     826    37RARP       A Reverse Address Resolution Protocol    Std     903    38IP-ARPA    Internet Protocol on ARPANET             Std BBN1822    39IP-WB      Internet Protocol on Wideband Network    Std     907    40IP-E       Internet Protocol on Ethernet Networks   Std     894    41IP-EE      Internet Protocol on Exp. Ethernet Nets  Std     895    42IP-IEEE    Internet Protocol on IEEE 802            Std    1042    43IP-DC      Internet Protocol on DC Networks         Std     891    44IP-HC      Internet Protocol on Hyperchannel        Std    1044    45IP-ARC     Transmitting IP Traffic over ARCNET Nets Std    1201    46IP-SLIP    Transmission of IP over Serial Lines     Std    1055    47IP-NETBIOS Transmission of IP over NETBIOS          Std    1088    48IP-IPX     Transmission of 802.2 over IPX Networks  Std    1132    49IP-HIPPI   IP over HIPPI                            Draft  2067[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Applicability Statements:   It is expected that a system will support one or more physical   networks and for each physical network supported the appropriate   protocols from the above list must be supported.  That is, it is   elective to support any particular type of physical network, and for   the physical networks actually supported it is required that they be   supported exactly according to the protocols in the above list.  See   also the Host and Gateway Requirements RFCs for more specific   information on network-specific ("link layer") protocols.Internet Architecture Board Standards Track                    [Page 23]

RFC 2400                   Internet Standards             September 19986.4.  Draft Standard ProtocolsProtocol   Name                                     Status          RFC========   =====================================    ============== =====URI-GEN    URI: Generic Syntax                      Elective       2396*IARP       Inverse Address Resolution Protocol      Elective       2390*TFTP-Opt   TFTP Options                             Elective       2349TFTP-Blk   TFTP Blocksize Option                    Elective       2348TFTP-Ext   TFTP Option Extension                    Elective       2347ONE-PASS   One-Time Password System                 Elective       2289SMTP-Pipe  SMTP Serv. Ext. for Command Pipelining   Elective       2197DHCP-BOOTP DHCP Options and BOOTP Extensions        Recommended    2132DHCP       Dynamic Host Configuration Protocol      Elective       2131FRAME-MIB  Management Information Base for Frame    Elective       2115-------    Clarifications and Extensions BOOTP      Elective       1542DHCP-BOOTP Interoperation Between DHCP and BOOTP    Elective       1534BOOTP      Bootstrap Protocol                      Recommended 951,2132MIME-CONF  MIME Conformance Criteria                Elective       2049MIME-MSG   MIME Msg Header Ext for Non-ASCII        Elective       2047MIME-MEDIA MIME Media Types                         Elective       2046MIME       Multipurpose Internet Mail Extensions    Elective       2045PPP-CHAP   PPP Challenge Handshake Authentication   Elective       1994PPP-MP     PPP Multilink Protocol                   Elective       1990PPP-LINK   PPP Link Quality Monitoring              Elective       1989COEX-MIB   Coexistence between SNMPV1 & SNMPV2      Elective       1908SNMPv2-MIB MIB for SNMPv2                           Elective       1907TRANS-MIB  Transport Mappings for SNMPv2            Elective       1906OPS-MIB    Protocol Operations for SNMPv2           Elective       1905CONF-MIB   Conformance Statements for SNMPv2        Elective       1904CONV-MIB   Textual Conventions for SNMPv2           Elective       1903SMIV2      SMI for SNMPv2                           Elective       1902CON-MD5    Content-MD5 Header Field                 Elective       1864OSPF-MIB   OSPF Version 2 MIB                       Elective       1850STR-REP    String Representation ...                Elective       1779X.500syn   X.500 String Representation ...          Elective       1778X.500lite  X.500 Lightweight ...                    Elective       1777BGP-4-APP  Application of BGP-4                     Elective       1772BGP-4      Border Gateway Protocol 4                Elective       1771PPP-DNCP   PPP DECnet Phase IV Control Protocol     Elective       1762RMON-MIB   Remote Network Monitoring MIB            Elective       1757802.5-MIB  IEEE 802.5 Token Ring MIB                Elective       1748RIP2-MIB   RIP Version 2 MIB Extension              Elective       1724RIP2       RIP Version 2-Carrying Additional Info.  Elective       1723RIP2-APP   RIP Version 2 Protocol App. Statement    Elective       1722SIP-MIB    SIP Interface Type MIB                   Elective       1694-------    Def Man Objs Parallel-printer-like       Elective       1660-------    Def Man Objs RS-232-like                 Elective       1659-------    Def Man Objs Character Stream            Elective       1658Internet Architecture Board Standards Track                    [Page 24]

RFC 2400                   Internet Standards             September 1998BGP-4-MIB  BGP-4 MIB                                Elective       1657SMTP-8BIT  SMTP Service Ext or 8bit-MIMEtransport   Elective       1652OSI-NSAP   Guidelines for OSI NSAP Allocation       Elective       1629ISO-TS-ECHO Echo for ISO-8473                       Elective       1575DECNET-MIB DECNET MIB                               Elective       1559BRIDGE-MIB BRIDGE-MIB                               Elective       1493NTPV3      Network Time Protocol (Version 3)        Elective       1305IP-MTU     Path MTU Discovery                       Elective       1191FINGER     Finger Protocol                          Elective       1288NICNAME    WhoIs Protocol                           Elective        954[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Applicability Statements:   PPP -- Point to Point Protocol is a method of sending IP over serial   lines, which are a type of physical network.  It is anticipated that   PPP will be advanced to the network-specifics standard protocol state   in the future.Internet Architecture Board Standards Track                    [Page 25]

RFC 2400                   Internet Standards             September 19986.5.  Proposed Standard ProtocolsProtocol   Name                                     Status          RFC========   =====================================    ============== =====--------   FTP Extensions for IPv6 and NATs         Elective       2428*MIME-VCARD vCard MIME Directory Profile             Elective       2426*TXT-DIR    MIME Content-Type for Directory Info     Elective       2425*CONT-DUR   Content-Duration MIME Header             Elective       2424*MIME-VPIM  VPIM Voice Message                       Elective       2423*MIME-ADPCM Toll Quality Voice - 32 kbit/s ADPC      Elective       2422*MIME-VP2   Voice Profile for Internet Mail V2       Elective       2421*--------   Multicast/UNI 3.0/3.1 based ATM MIB      Elective       2417*DATA-URL   "data" URL scheme                        Elective       2397*CIDMID-URL Content-ID and Message-ID URLs           Elective       2392*FTP-FNEGO  Feature negotiation mechanism for FTP    Elective       2389*--------   MIME Multipart/form-data                 Elective       2388*MIME-RELAT MIME Multipart/Related Content-type      Elective       2387*--------   Protection of BGP Sessions via TCP MD5   Elective       2385*POP-URL    POP URL Scheme                           Elective       2384*--------   Interoperation of CLS and GS with ATM    Elective       2381*--------   RSVP over ATM Imple. Requirements        Elective       2380*--------   IPv6 Aggreg. Global Unicast Addr. Format Elective       2374*--------   IPv6 Addressing Architecture             Elective       2373*TIPV3      Transaction Internet Protocol V3         Elective       2371*OSPF-LSA   OSPF Opaque LSA Option                   Elective       2370*--------   Use of URLs as Meta-Syntax...            Elective       2369*URLMAILTO  mailto URL scheme                        Elective       2368*PPP-AAL    PPP Over AAL                             Elective       2364*PPP-FUNI   PPP Over FUNI                            Elective       2363*IMAP4UIDPL IMAP4 UIDPLUS Extension                  Elective       2359*--------   Ethernet-like Interface Types MIB        Elective       2358*MOBILIPREV Reverse Tunneling for Mobile IP          Elective       2344IMAP4NAME  IMAP4 Namespace                          Elective       2342VRRP       Virtual Router Redundancy Protocol       Elective       2338NHRP-SCSP  Distributed NHRP Service Using SCSP      Elective       2335SCSP       Server Cache Synchronization Protocol    Elective       2334NHRP-APP   NHRP Protocol Applicability Statement    Elective       2333NHRP       NBMA Next Hop Resolution Protocol        Elective       2332UNI-SIG    ATM Sig Support (IPOA) UNI Signalling    Elective       2331SDP        Session Description Protocol             Elective       2327RTSP       Real Time Streaming Protocol             Elective       2326IPOA-MIB   Classical IP and ARP Over ATM MIB        Elective       2320DNS-NCACHE Negative Caching of DNS Queries          Elective       2308SMFAX-IM   Simple Mode of FAX Using Internet Mail   Elective       2305MINFAX-IM  Minimal FAX addr format in Internet Mail Elective       2304MIN-PSTN   Min. PSTN addr format in Internet Mail   Elective       2303TIFF       Tag Image File Format                    Elective       2302FFIF       File Format for Internet Fax             Elective       2301Internet Architecture Board Standards Track                    [Page 26]

RFC 2400                   Internet Standards             September 1998EMF-MDN    Extensible Message Format for MDN        Elective       2298OR-ADD     O/R Address hierarchy in X.500           Elective       2294SUBTABLE   Tables and Subtrees in X.500             Elective       2293--------   Mobile-IPv4 Config Opt for PPP IPCP      Elective       2290SLM-APP    System-Level Managed Objects for Apps    Elective       2287PPP-EAP    PPP Extensible Authentication Protocol   Elective       2284MEXT-BGP4  Multiprotocol Extensions for BGP-4       Elective       2283RPSL       Routing Policy Specification Language    Elective       2280UTF-8      UTF-8 transformation format of ISO 10646 Elective       2279VACM-SNMP  View-based Access Control Model for SMMP Elective       2275USM-SNMPV3 User-based Security Model for SNMPv3     Elective       2274SNMPV3-APP SNMPv3 Applications                      Elective       2273MPD-SNMP   Message Processing & Dispatching SNMP    Elective       2272ARCH-SNMP  Architecture Describing SNMP Frameworks  Elective       2271--------   IEEE 802.12 Repeater MIB                 Elective       2266AGENTX     Agent Extensibility Protocol             Elective       2257--------   Summary of the X.500(96) with LDAPv3     Elective       2256LDAP-URL   LDAP URL Format                          Elective       2255STR-LDAP   String Rep of LDAP Search Filters        Elective       2254LDAP3-UTF8 LDAPv3: UTF-8 String Rep                 Elective       2253LDAP3-ATD  LDAP3-: Attribute Syntax Definitions     Elective       2252LDAPV3     Lightweight Directory Access Protocol    Elective       2251RTP-MPEG   RTP Payload Format for MPEG1/MPEG2       Elective       2250MAIL-MIB   Mail Monitoring MIB                      Elective       2249NSM-MIB    Network Services Monitoring MIB          Elective       2248--------   Using Domains LDAP/X.500 Dist. Names     Elective       2247SASL-ANON  Anonymous SASL Mechanism                 Elective       2245ACAP       Application Configuration Access         Elective       2244OTP-ER     OTP Extended Responses                   Elective       2243NETWAREIP  NetWare/IP Domain Name and Information   Elective       2242DHCP-NDS   DHCP Options for Novell Directory Serv.  Elective       2241MAUS-MIB   IEEE 802.3 Medium Attachment Units MIB   Elective       2239HPR-MIB    Definitions of Managed Objects for HPR   Elective       2238IGMP       Internet Group Management Protocol V2    Elective       2236ABNF       Augmented BNF for Syntax Specifications  Elective       2234INTERGRMIB Interfaces Group MIB                     Elective       2233DLUR-MIB   Definitions of Managed Objects for DLUR  Elective       2232MIME-EXT   MIME Parameter Value & Encoded Word Ext  Elective       2231FTPSECEXT  FTP Security Extensions                  Elective       2228---------  Simple Hit-Metering, Usage-Limiting HTTP Elective       2227---------  IP Broadcast over ATM Networks           Elective       2226SASL       Simple Authentication and Security Layer Elective       2222IMAP4LOGIN IMAP4 Login Referrals                    Elective       2221---------  Schema for Internet White Pages Service  Elective       2218---------  Characterization Parameters for ISNE     Elective       2215---------  Integrated Services MIB Guar Serv Ext    Elective       2214---------  Integrated Services MIB using SMIv2      Elective       2213GQOS       Spec. of Guaranteed Quality of Service   Elective       2212Internet Architecture Board Standards Track                    [Page 27]

RFC 2400                   Internet Standards             September 1998---------  Spec. of Controlled-Load Net Ele Serv    Elective       2211RSVP-IS    Use of RSVP with IETF Integrated Serv    Elective       2210RSVP-MPR   RSVP Messaging Processing Rules          Elective       2209RSVP-APP   RSVP Applicability Statement             Elective       2208RSVP-IPSEC RSVP Extensions for IPSEC Data Flows     Elective       2207RSVP-MIB   RSVP Management Information Base         Elective       2206RSVP       Resource ReSerVation Protocol V1         Elective       2205RPCSEC-GSS RPCSEC_GSS Protocol Specification        Elective       2203RTP-RAD    RTP Payload for Redundant Audio Data     Elective       2198IMAPPOPAU  IMAP/POP AUTHorize Extension             Elective       2195IMAP4MAIL  IMAP4 Mailbox Referrals                  Elective       2193IMAP-URL   IMAP URL Scheme                          Elective       2192---------  RTP Payload Format for H.263 Video ST    Elective       2190---------  The Content-Disposition Header Field     Elective       2183DNS-CLAR   Clarifications to the DNS Specification  Elective       2181IMAP4-IDLE IMAP4 IDLE command                       Elective       2177SLP        Service Location Protocol                Elective       2165---------  X.500/LDAP Directory/MIXER Address Map.  Elective       2164DNS-MCGAM  Using DNS to Distribute MCGAM            Elective       2163---------  Carrying PostScript in X.400 and MIME    Elective       2160---------  A MIME Body Part for FAX                 Elective       2159---------  X.400 Image Body Parts                   Elective       2158---------  Mapping between X.400 andRFC-822/MIME   Elective       2157MIXER      Mime Internet X.400 Enhanced Relay       Elective       2156APPN-MIB   Definitions of Managed Objects for APPN  Elective       2155IPv6-Jumbo TCP and UDP over IPv6 Jumbograms         Elective       2147MAIL-SERV  Mailbox Names for Common Services        Elective       2142URN-SYNTAX URN Syntax                               Elective       2141RADIUS     Remote Authentication Dial In Service    Elective       2138SDNSDU     Secure Domain Name System Dynamic Update Elective       2137DNS-UPDATE Dynamic Updates in the DNS               Elective       2136DC-MIB     Dial Control MIB using SMIv2             Elective       2128ISDN-MIB   ISDN MIB using SMIv2                     Elective       2127ITOT       ISO Transport Service on top of TCP      Elective       2126BAP-BACP   PPP-BAP, PPP-BACP                        Elective       2125VEMMI-URL  VEMMI URL Specification                  Elective       2122ROUT-ALERT IP Router Alert Option                   Elective       2113MHTML      MIME E-mail Encapsulation                Elective       2110HTTP-STATE HTTP State Management Mechanism          Elective       2109802.3-MIB  802.3 Repeater MIB using SMIv2           Elective       2108PPP-NBFCP  PPP NetBIOS Frames Control Protocol      Elective       2097TABLE-MIB  IP Forwarding Table MIB                  Elective       2096RIP-TRIG   Trigger RIP                              Elective       2091IMAP4-LIT  IMAP4 non-synchronizing literals         Elective       2088IMAP4-QUO  IMAP4 QUOTA extension                    Elective       2087IMAP4-ACL  IMAP4 ACL Extension                      Elective       2086HMAC-MD5   HMAC-MD5 IP Auth. with Replay Prevention Elective       2085RIP2-MD5   RIP-2 MD5 Authentication                 Elective       2082Internet Architecture Board Standards Track                    [Page 28]

RFC 2400                   Internet Standards             September 1998RIPNG-IPV6 RIPng for IPv6                           Elective       2080URI-ATT    URI Attribute Type and Object Class      Elective       2079GSSAP      Generic Security Service Application     Elective       2078MIME-MODEL Model Primary MIME Types                 Elective       2077RMON-MIB   Remote Network Monitoring MIB            Elective       2074HTML-INT   HTML Internationalization                Elective       2070DAA        Digest Access Authentication             Elective       2069HTTP-1.1   Hypertext Transfer Protocol -- HTTP/1.1  Elective       2068DNS-SEC    Domain Name System Security Extensions   Elective       2065IMAPV4     Internet Message Access Protocol v4rev1  Elective       2060URLZ39.50  Uniform Resource Locators for Z39.50     Elective       2056SNANAU-APP SNANAU APPC MIB using SMIv2              Elective       2051PPP-SNACP  PPP SNA Control Protocol                 Elective       2043ENTITY-MIB Entity MIB using SMIv2                   Elective       2037RTP-JPEG   RTP Payload Format for JPEG-compressed   Elective       2035SMTP-ENH   SMTP Enhanced Error Codes                Elective       2034RTP-H.261  RTP Payload Format for H.261             Elective       2032RTP-CELLB  RTP Payload Format of Sun's CellB        Elective       2029SPKM       Simple Public-Key GSS-API Mechanism      Elective       2025DLSW-MIB   DLSw MIB using SMIv2                     Elective       2024IPV6-PPP   IP Version 6 over PPP                    Elective       2023MULTI-UNI  Multicast over UNI 3.0/3.1 based ATM     Elective       2022RMON-MIB   RMON MIB using SMIv2                     Elective       2021802.12-MIB IEEE 802.12 Interface MIB                Elective       2020IPV6-FDDI  Transmission of IPv6 Packets Over FDDI   Elective       2019TCP-ACK    TCP Selective Acknowledgement Options    Elective       2018URL-ACC    URL Access-Type                          Elective       2017MIME-PGP   MIME Security with PGP                   Elective       2015MIB-UDP    SNMPv2 MIB for UDP                       Elective       2013MIB-TCP    SNMPv2 MIB for TCP                       Elective       2012MIB-IP     SNMPv2 MIB for IP                        Elective       2011MOBILEIPMIBMobile IP MIB Definition using SMIv2     Elective       2006MOBILEIPAPPApplicability Statement for IP Mobility  Elective       2005MINI-IP    Minimal Encapsulation within IP          Elective       2004IPENCAPIP  IP Encapsulation within IP               Elective       2003MOBILEIPSUPIP Mobility Support                      Elective       2002TCPSLOWSRT TCP Slow Start, Congestion Avoidance...  Elective       2001BGP-COMM   BGP Communities Attribute                Elective       1997DNS-NOTIFY Mech. for Notification of Zone Changes   Elective       1996DNS-IZT    Incremental Zone Transfer in DNS         Elective       1995SMTP-ETRN  SMTP Service Extension ETRN              Elective       1985SNA        Serial Number Arithmetic                 Elective       1982MTU-IPV6   Path MTU Discovery for IP version 6      Elective       1981PPP-FRAME  PPP in Frame Relay                       Elective       1973IPV6-ETHER Transmission IPv6 Packets Over Ethernet  Elective       1972IPV6-AUTO  IPv6 Stateless Address Autoconfiguation  Elective       1971IPV6-ND    Neighbor Discovery for IP Version 6      Elective       1970PPP-ECP    PPP Encryption Control Protocol          Elective       1968Internet Architecture Board Standards Track                    [Page 29]

RFC 2400                   Internet Standards             September 1998GSSAPI-KER Kerberos Version 5 GSS-API Mechanism     Elective       1964PPP-CCP    PPP Compression Control Protocol         Elective       1962GSSAPI-SOC GSS-API Auth for SOCKS Version 5         Elective       1961LDAP-STR   String Rep. of LDAP Search Filters       Elective       1960LDAP-URL   LDAP URL Format                          Elective       1959TRANS-IPV6 Transition Mechanisms IPv6 Hosts/Routers Elective       1933AUTH-SOCKS Username Authentication for SOCKS V5     Elective       1929SOCKSV5    SOCKS Protocol Version 5                 Elective       1928WHOIS++M   How to Interact with a Whois++ Mesh      Elective       1914WHOIS++A   Architecture of Whois++ Index Service    Elective       1913DSN        Delivery Status Notifications            Elective       1894EMS-CODE   Enhanced Mail System Status Codes        Elective       1893MIME-RPT   Multipart/Report                         Elective       1892SMTP-DSN   SMTP Delivery Status Notifications       Elective       1891RTP-AV     RTP Audio/Video Profile                  Elective       1890RTP        Transport Protocol for Real-Time Apps    Elective       1889DNS-IPV6   DNS Extensions to support IPv6           Elective       1886ICMPv6     ICMPv6 for IPv6                          Elective       1885IPV6       IPv6 Specification                       Elective       1883HTML       Hypertext Markup Language - 2.0          Elective       1866MIME-Sec   MIME Object Security Services            Elective       1848MIME-Encyp MIME: Signed and Encrypted               Elective       1847WHOIS++    Architecture of the WHOIS++ service      Elective       1835--------   Binding Protocols for ONC RPC Version 2  Elective       1833XDR        External Data Representation Standard    Elective       1832RPC        Remote Procedure Call Protocol V. 2      Elective       1831--------   ESP DES-CBC Transform                    Ele/Req        1829--------   IP Authentication using Keyed MD5        Ele/Req        1828ESP        IP Encapsulating Security Payload        Ele/Req        1827IPV6-AH    IP Authentication Header                 Ele/Req        1826--------   Security Architecture for IP             Ele/Req        1825RREQ       Requirements for IP Version 4 Routers    Elective       1812URL        Relative Uniform Resource Locators       Elective       1808CLDAP      Connection-less LDAP                     Elective       1798OSPF-DC    Ext. OSPF to Support Demand Circuits     Elective       1793OSI-Dir    OSI User Friendly Naming ...             Elective       1781MIME-EDI   MIME Encapsulation of EDI Objects        Elective       1767Lang-Tag   Tags for Identification of Languages     Elective       1766XNSCP      PPP XNS IDP Control Protocol             Elective       1764BVCP       PPP Banyan Vines Control Protocol        Elective       1763Print-MIB  Printer MIB                              Elective       1759ATM-SIG    ATM Signaling Support for IP over ATM    Elective       1755IPNG       Recommendation for IP Next Generation    Elective       1752802.5-SSR  802.5 SSR MIB using SMIv2                Elective       1749SDLCSMIv2  SNADLC SDLC MIB using SMIv2              Elective       1747BGP4/IDRP  BGP4/IDRP for IP/OSPF Interaction        Elective       1745AT-MIB     Appletalk MIB                            Elective       1742MacMIME    MIME Encapsulation of Macintosh files    Elective       1740Internet Architecture Board Standards Track                    [Page 30]

RFC 2400                   Internet Standards             September 1998URL        Uniform Resource Locators                Elective       1738POP3-AUTH  POP3 AUTHentication command              Elective       1734IMAP4-AUTH IMAP4 Authentication Mechanisms          Elective       1731RDBMS-MIB  RDMS MIB - using SMIv2                   Elective       1697MODEM-MIB  Modem MIB - using SMIv2                  Elective       1696ATM-MIB    ATM Management Version 8.0 using SMIv2   Elective       1695TMUX       Transport Multiplexing Protocol          Elective       1692SNANAU-MIB SNA NAUs MIB using SMIv2                 Elective       1666PPP-TRANS  PPP Reliable Transmission                Elective       1663--------   Postmaster Convention X.400 Operations   Elective       1648PPP-BCP    PPP Bridging Control Protocol            Elective       1638UPS-MIB    UPS Management Information Base          Elective       1628PPP-SONET  PPP over SONET/SDH                       Elective       1619PPP-ISDN   PPP over ISDN                            Elective       1618DNS-R-MIB  DNS Resolver MIB Extensions              Elective       1612DNS-S-MIB  DNS Server MIB Extensions                Elective       1611FR-MIB     Frame Relay Service MIB                  Elective       1604PPP-X25    PPP in X.25                              Elective       1598OSPF-NSSA  The OSPF NSSA Option                     Elective       1587OSPF-Multi Multicast Extensions to OSPF             Elective       1584SONET-MIB  MIB SONET/SDH Interface Type             Elective       1595RIP-DC     Extensions to RIP to Support Demand Cir. Elective       1582--------   Evolution of the Interfaces Group of MIB-II Elective    1573PPP-LCP    PPP LCP Extensions                       Elective       1570X500-MIB   X.500 Directory Monitoring MIB           Elective       1567CIPX       Compressing IPX Headers Over WAM Media   Elective       1553IPXCP      PPP Internetworking Packet Exchange Control Elective    1552SRB-MIB    Source Routing Bridge MIB                Elective       1525CIDR-STRA  CIDR Address Assignment...               Elective       1519CIDR-ARCH  CIDR Architecture...                     Elective       1518CIDR-APP   CIDR Applicability Statement             Elective       1517--------   802.3 MAU MIB                            Elective       1515HOST-MIB   Host Resources MIB                       Elective       1514--------   Token Ring Extensions to RMON MIB        Elective       1513FDDI-MIB   FDDI Management Information Base         Elective       1512KERBEROS   Kerberos Network Authentication Ser (V5) Elective       1510GSSAPI     Generic Security Service API: C-bindings Elective       1509DASS       Distributed Authentication Security...   Elective       1507--------   X.400 Use of Extended Character Sets     Elective       1502HARPOON    Rules for Downgrading Messages...        Elective       1496Equiv      X.400/MIME Body Equivalences             Elective       1494IDPR       Inter-Domain Policy Routing Protocol     Elective       1479IDPR-ARCH  Architecture for IDPR                    Elective       1478PPP/Bridge MIB Bridge PPP MIB                       Elective       1474PPP/IP MIB  IP Network Control Protocol of PPP MIB  Elective       1473PPP/SEC MIB Security Protocols of PPP MIB           Elective       1472PPP/LCP MIB Link Control Protocol of PPP MIB        Elective       1471X25-MIB    Multiprotocol Interconnect on X.25 MIB   Elective       1461Internet Architecture Board Standards Track                    [Page 31]

RFC 2400                   Internet Standards             September 1998SNMPv2     Introduction to SNMPv2                   Elective       1441PEM-KEY    PEM - Key Certification                  Elective       1424PEM-ALG    PEM - Algorithms, Modes, and Identifiers Elective       1423PEM-CKM    PEM - Certificate-Based Key Management   Elective       1422PEM-ENC    PEM - Message Encryption and Auth        Elective       1421SNMP-IPX   SNMP over IPX                            Elective       1420SNMP-AT    SNMP over AppleTalk                      Elective       1419SNMP-OSI   SNMP over OSI                            Elective       1418FTP-FTAM   FTP-FTAM Gateway Specification           Elective       1415IDENT-MIB  Identification MIB                       Elective       1414IDENT      Identification Protocol                  Elective       1413DS3/E3-MIB DS3/E3 Interface Type                    Elective       1407DS1/E1-MIB DS1/E1 Interface Type                    Elective       1406BGP-OSPF   BGP OSPF Interaction                     Elective       1403--------   Route Advertisement In BGP2 And BGP3     Elective       1397SNMP-X.25  SNMP MIB Extension for X.25 Packet Layer Elective       1382SNMP-LAPB  SNMP MIB Extension for X.25 LAPB         Elective       1381PPP-ATCP   PPP AppleTalk Control Protocol           Elective       1378PPP-OSINLCP PPP OSI Network Layer Control Protocol  Elective       1377SNMP-PARTY-MIB Administration of SNMP               Elective       1353SNMP-SEC   SNMP Security Protocols                  Elective       1352SNMP-ADMIN SNMP Administrative Model                Elective       1351TOS        Type of Service in the Internet          Elective       1349PPP-IPCP   PPP Control Protocol                     Elective       1332-------    X.400 1988 to 1984 downgrading           Elective       1328TCP-EXT    TCP Extensions for High Performance      Elective       1323NETFAX     File Format for the Exchange of Images   Elective       1314FDDI-MIB   FDDI-MIB                                 Elective       1285-------    Encoding Network Addresses               Elective       1277-------    Replication and Distributed Operations   Elective       1276-------    COSINE and Internet X.500 Schema         Elective       1274BGP-MIB    Border Gateway Protocol MIB (Version 3)  Elective       1269ICMP-ROUT  ICMP Router Discovery Messages           Elective       1256OSI-UDP    OSI TS on UDP                            Elective       1240STD-MIBs   Reassignment of Exp MIBs to Std MIBs     Elective       1239IPX-IP     Tunneling IPX Traffic through IP Nets    Elective       1234IS-IS      OSI IS-IS for TCP/IP Dual Environments   Elective       1195IP-CMPRS   Compressing TCP/IP Headers               Elective       1144NNTP       Network News Transfer Protocol           Elective        977[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.][Note: Ele/Req indicates elective for use with IPv4 and required for usewith IPv6.]Applicability Statements:Internet Architecture Board Standards Track                    [Page 32]

RFC 2400                   Internet Standards             September 19986.6.  Telnet OptionsFor convenience, all the Telnet Options are collected here with boththeir state and status.Protocol   Name                           Number  State Status  RFC STD========   =====================================  ===== ====== ==== ===TOPT-BIN   Binary Transmission                 0  Std   Rec     856  27TOPT-ECHO  Echo                                1  Std   Rec     857  28TOPT-RECN  Reconnection                        2  Prop  Ele     ...TOPT-SUPP  Suppress Go Ahead                   3  Std   Rec     858  29TOPT-APRX  Approx Message Size Negotiation     4  Prop  Ele     ...TOPT-STAT  Status                              5  Std   Rec     859  30TOPT-TIM   Timing Mark                         6  Std   Rec     860  31TOPT-REM   Remote Controlled Trans and Echo    7  Prop  Ele     726TOPT-OLW   Output Line Width                   8  Prop  Ele     ...TOPT-OPS   Output Page Size                    9  Prop  Ele     ...TOPT-OCRD  Output Carriage-Return Disposition 10  Hist  Ele     652    *TOPT-OHT   Output Horizontal Tabstops         11  Hist  Ele     653    *TOPT-OHTD  Output Horizontal Tab Disposition  12  Hist  Ele     654    *TOPT-OFD   Output Formfeed Disposition        13  Hist  Ele     655    *TOPT-OVT   Output Vertical Tabstops           14  Hist  Ele     656    *TOPT-OVTD  Output Vertical Tab Disposition    15  Hist  Ele     657    *TOPT-OLD   Output Linefeed Disposition        16  Hist  Ele     658    *TOPT-EXT   Extended ASCII                     17  Prop  Ele     698TOPT-LOGO  Logout                             18  Prop  Ele     727TOPT-BYTE  Byte Macro                         19  Prop  Ele     735TOPT-DATA  Data Entry Terminal                20  Prop  Ele    1043TOPT-SUP   SUPDUP                             21  Prop  Ele     736TOPT-SUPO  SUPDUP Output                      22  Prop  Ele     749TOPT-SNDL  Send Location                      23  Prop  Ele     779TOPT-TERM  Terminal Type                      24  Prop  Ele    1091TOPT-EOR   End of Record                      25  Prop  Ele     885TOPT-TACACS  TACACS User Identification       26  Prop  Ele     927TOPT-OM    Output Marking                     27  Prop  Ele     933TOPT-TLN   Terminal Location Number           28  Prop  Ele     946TOPT-3270  Telnet 3270 Regime                 29  Prop  Ele    1041TOPT-X.3   X.3 PAD                            30  Prop  Ele    1053TOPT-NAWS  Negotiate About Window Size        31  Prop  Ele    1073TOPT-TS    Terminal Speed                     32  Prop  Ele    1079TOPT-RFC   Remote Flow Control                33  Prop  Ele    1372TOPT-LINE  Linemode                           34  Draft Ele    1184TOPT-XDL   X Display Location                 35  Prop  Ele    1096TOPT-ENVIR Telnet Environment Option          36  Hist  Not    1408TOPT-AUTH  Telnet Authentication Option       37  Exp   Ele    1416TOPT-ENVIR Telnet Environment Option          39  Prop  Ele    1572TOPT-TN3270E TN3270 Enhancements              40  Draft Ele    2355    *TOPT-AUTH  Telnet XAUTH                       41  ExpInternet Architecture Board Standards Track                    [Page 33]

RFC 2400                   Internet Standards             September 1998TOPT-CHARSET Telnet CHARSET                   42  Exp          2066TOPR-RSP   Telnet Remote Serial Port          43  ExpTOPT-COMPORT Telnet Com Port Control          44  Exp          2217TOPT-SLE   Telnet Suppress Local Echo         45  Exp                  *TOPT-STARTTLS Telnet Start TLS                46  Exp                  *TOPT-KERMIT   Telnet KERMIT                   47  Exp                  *TOPT-SEND-URL Send-URL                        48  Exp                  *TOPT-EXTOP Extended-Options-List             255  Std   Rec     861  32[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Internet Architecture Board Standards Track                    [Page 34]

RFC 2400                   Internet Standards             September 19986.7.  Experimental ProtocolsAll Experimental protocols have the Limited Use status.Protocol   Name                                                     RFC========   =====================================                   =====TCP-WIN    Increasing TCP's Initial Window                         2414*PIM-SM     Protocol Independent Multicast-Sparse Mode              2362*-------    Domain Names and Company Name Retrieva                  2345RTP-MPEG   RTP Payload Format for Bundled MPEG                     2343-------    Intra-LIS IP Multicast/Routers over ATM using PIM       2337-------    Safe Response Header Field                              2310LDAP-NIS   Approach Using LDAP as a Network Information Service    2307HTTP-RVSA  HTTP Remote Variant Selection Algorithm                 2296TCN-HTTP   Transparent Content Negotiation in HTTP                 2295-------    Core Based Trees (CBT) Multicast Routing Architecture   2201-------    Core Based Trees (CBT version 2) Multicast Routing      2189-------    Trivial Convention using HTTP in URN Resolution         2169-------    Resolution of URIs using DNS                            2168MAP-MAIL   X.400 Mapping and Mail-11                               2162MIME-ODA   A MIME Body Part for ODA                                2161OSPF-DIG   OSPF with Digital Signature                             2154GKMP-ARCH  Group Key Management Protocol (GKMP) Architecture       2094GKMP-SPEC  Group Key Management Protocol (GKMP) Specification      2093IP-SCSI    Encapsulating IP with the SCSI                          2143X.500-NAME Managing the X.500 Root Naming Context                  2120TFTP-MULTI TFTP Multicast Option                                   2090IP-Echo    IP Echo Host Service                                    2075METER-MIB  Traffic Flow Measurement Meter MIB                      2064TFM-ARCH   Traffic Flow Measurement Architecture                   2063DNS-SRV    Location of Services in the DNS                         2052URAS       Uniform Resource Agents                                 2016GPS-AR     GPS-Based Addressing and Routing                        2009ETFTP      Enhanced Trivial File Transfer Protocol                 1986BGP-RR     BGP Route Reflection                                    1966BGP-ASC    Autonomous System Confederations for BGP                1965SMKD       Scalable Multicast Key Distribution                     1949HTML-TBL   HTML Tables                                             1942SNMPV2SM   User-based Security Model for SNMPv2                    1910SNMPV2AI   SNMPv2 Administrative Infrastructure                    1909SNMPV2CB   Introduction to Community-based SNMPv2                  1901-------    IPv6 Testing Address Allocation                         1897DNS-LOC    Location Information in the DNS                         1876SGML-MT    SGML Media Types                                        1874CONT-MT    Access Type Content-ID                                  1873UNARP      ARP Extension - UNARP                                   1868-------    Form-based File Upload in HTML                          1867-------    BGP/IDRP Route Server Alternative                       1863Internet Architecture Board Standards Track                    [Page 35]

RFC 2400                   Internet Standards             September 1998-------    IP Authentication using Keyed SHA                       1852ESP3DES    ESP Triple DES Transform                                1851-------    SMTP 521 Reply Code                                     1846-------    SMTP Serv. Ext. for Checkpoint/Restart                  1845-------    SMTP Serv. Ext. Large and Binary MIME Msgs.             1830ST2        Stream Protocol Version 2                               1819-------    Content-Disposition Header                              1806-------    Schema Publishing in X.500 Directory                    1804-------    X.400-MHS use X.500 to support X.400-MHS Routing        1801-------    Class A Subnet Experiment                               1797TCP/IPXMIB TCP/IPX Connection Mib Specification                    1792-------    TCP And UDP Over IPX Networks With Fixed Path MTU       1791ICMP-DM    ICMP Domain Name Messages                               1788CLNP-MULT  Host Group Extensions for CLNP Multicasting             1768OSPF-OVFL  OSPF Database Overflow                                  1765RWP        Remote Write ProtocolL - Version 1.0                    1756NARP       NBMA Address Resolution Protocol                        1735DNS-ENCODE DNS Encoding of Geographical Location                   1712TCP-POS    An Extension to TCP: Partial Order Service              1693T/TCP      TCP Extensions for Transactions                         1644MIME-UNI   Using Unicode with MIME                                 1641FOOBAR     FTP Operation Over Big Address Records                  1639X500-CHART Charting Networks in the X.500 Directory                1609X500-DIR   Representing IP Information in the X.500 Directory      1608SNMP-DPI   SNMP Distributed Protocol Interface                     1592CLNP-TUBA  Use of ISO CLNP in TUBA Environments                    1561REM-PRINT  TPC.INT Subdomain Remote Printing - Technical           1528EHF-MAIL   Encoding Header Field for Internet Messages             1505RAP        Internet Route Access Protocol                          1476TP/IX      TP/IX: The Next Internet                                1475X400       Routing Coordination for X.400 Services                 1465DNS        Storing Arbitrary Attributes in DNS                     1464IRCP       Internet Relay Chat Protocol                            1459TOS-LS     Link Security TOS                                       1455SIFT/UFT   Sender-Initiated/Unsolicited File Transfer              1440DIR-ARP    Directed ARP                                            1433TEL-SPX    Telnet Authentication: SPX                              1412TEL-KER    Telnet Authentication: Kerberos V4                      1411TRACE-IP   Traceroute Using an IP Option                           1393DNS-IP     Experiment in DNS Based IP Routing                      1383RMCP       Remote Mail Checking Protocol                           1339TCP-HIPER  TCP Extensions for High Performance                     1323MSP2       Message Send Protocol 2                                 1312DSLCP      Dynamically Switched Link Control                       1307--------   X.500 and Domains                                       1279IN-ENCAP   Internet Encapsulation Protocol                         1241CLNS-MIB   CLNS-MIB                                                1238CFDP       Coherent File Distribution Protocol                     1235Internet Architecture Board Standards Track                    [Page 36]

RFC 2400                   Internet Standards             September 1998IP-AX.25   IP Encapsulation of AX.25 Frames                        1226ALERTS     Managing Asynchronously Generated Alerts                1224MPP        Message Posting Protocol                                1204SNMP-BULK  Bulk Table Retrieval with the SNMP                      1187DNS-RR     New DNS RR Definitions                                  1183IMAP2      Interactive Mail Access Protocol                        1176NTP-OSI    NTP over OSI Remote Operations                          1165DMF-MAIL   Digest Message Format for Mail                          1153RDP        Reliable Data Protocol                              908,1151TCP-ACO    TCP Alternate Checksum Option                           1146IP-DVMRP   IP Distance Vector Multicast Routing                    1075VMTP       Versatile Message Transaction Protocol                  1045COOKIE-JAR Authentication Scheme                                   1004NETBLT     Bulk Data Transfer Protocol                              998IRTP       Internet Reliable Transaction Protocol                   938LDP        Loader Debugger Protocol                                 909RLP        Resource Location Protocol                               887NVP-II     Network Voice Protocol                              ISI-memoPVP        Packet Video Protocol                               ISI-memo[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Internet Architecture Board Standards Track                    [Page 37]

RFC 2400                   Internet Standards             September 19986.8.  Informational ProtocolsInformation protocols have no status.Protocol   Name                                                     RFC=======    ====================================                    =====--------   ST2+ over ATM Protocol Spec - UNI 3.1 Version           2383*--------   Mapping Airline Reservation, Ticketing, Messaging       2351KOI8-U     Ukrainian Character Set KOI8-U                          2319TEXT-CSS   The text/css Media Type                                 2318PKCS-7     PKCS #7: Cryptographic Message Syntax Version 1.5       2315PKCS-10    PKCS #10: Certification Request Syntax Version 1.5      2314PKCS-1     PKCS #1: RSA Encryption Version 1.5                     2313SMIME-CERT S/MIME Version 2 Certificate Handling                   2312SMIME-MSG  S/MIME Version 2 Message Specification                  2311TIFF       Tag Image File Format F Profile for Facsimile           2302GSMP       Ipsilon's General Switch Management Protocol            2297HSRP       Cisco Hot Standby Router Protocol (HSRP)                2281RC2-ENCRP  A Description of the RC2(r) Encryption Algorithm        2268SNQP       Simple Nomenclator Query Protocol                       2259--------   Japanese Character Encoding for Internet Messages       2237KEYX-DNS   Key Exchange Delegation Record for the DNS              2230DSP        A Dictionary Server Protocol                            2229NFS-URL    NFS URL Scheme                                          2224APP-MARC   The Application/MARC Content-type                       2220ODETTE-FTP ODETTE File Transfer Protocol                           2204ESRO       AT&T/Neda's Efficient Short Remote Operations Protocol  2188ICP        Internet Cache Protocol Version 2                       2186IPV4-MAPOS IPv4 over MAPOS Version 1                               2176MAPOS-SONET Multiple Access Protocol over SONET/SDH Version 1      2171RWHOIS     Referral Whois Protocol                                 2167PPP-EXT    PPP Vendor Extensions                                   2153UTF-7      UTF-7                                                   2152CAST-128   CAST-128 Encryption Algorithm                           2144RADIUS-ACC RADIUS Accounting                                       2139DLSCAP     Data Link Switching Client Access Protocol              2114PNG        Portable Network Graphics Version 1.0                   2083RC5        RC5, RC5-CBC, RC5-CBC-Pad, and RC5-CTS Algorithms       2040SNTP       Simple Network Time Protocol v4 for IPv4, IPv6 and OSI  2030PGP-MEF    PGP Message Exchange Formats                            1991PPP-DEFL   PPP Deflate Protocol                                    1979PPP-PRED   PPP Predictor Compression Protocol                      1978PPP-BSD    PPP BSD Compression Protocol                            1977PPP-DCE    PPP for Data Compression in DCE                         1976PPP-MAG    PPP Magnalink Variable Resource Compression             1975PPP-STAC   PPP Stac LZS Compression Protocol                       1974GZIP       GZIP File Format Specification Version 4.3              1952DEFLATE    DEFLATE Compressed Data Format Specification V. 1.3     1951Internet Architecture Board Standards Track                    [Page 38]

RFC 2400                   Internet Standards             September 1998ZLIB       ZLIB Compressed Data Format Specification V. 3.3        1950HTTP-1.0   Hypertext Transfer Protocol -- HTTP/1.0                 1945--------   text/enriched MIME Content-type                         1896--------   Application/CALS-1840 Content-type                      1895--------   PPP IPCP Extensions for Name Server Addresses           1877SNPP       Simple Network Paging Protocol - Version 2              1861--------   ISO Transport Class 2 Non-use Explicit Flow Control     1859           over TCPRFC1006 extension--------   IP in IP Tunneling                                      1853--------   PPP Network Control Protocol for LAN Extension          1841TESS       The Exponential Security System                         1824NFSV3      NFS Version 3 Protocol Specification                    1813--------   A Format for Bibliographic Records                      1807-------    Data Link Switching: Switch-to-Switch Protocol          1795BGP-4      Experience with the BGP-4 Protocol                      1773SDMD       IPv4 Option for Sender Directed MD Delivery             1770SNOOP      Snoop Version 2 Packet Capture File Format              1761BINHEX     MIME Content Type for BinHex Encoded Files              1741DNS-NSAP   DNS NSAP Resource Records                               1706RADIO-PAGE TPC.INT Subdomain: Radio Paging -- Technical Procedures 1703GRE-IPv4   Generic Routing Encapsulation over IPv4                 1702GRE        Generic Routing Encapsulatio                            1701ADSNA-IP   Advanced SNA/IP: A Simple SNA Transport Protocol        1538TACACS     Terminal Access Control Protocol                        1492MD4        MD4 Message Digest Algorithm                            1320SUN-NFS    Network File System Protocol                            1094SUN-RPC    Remote Procedure Call Protocol Version 2                1057GOPHER     The Internet Gopher Protocol                            1436LISTSERV   Listserv Distribute Protocol                            1429-------    Replication Requirements                                1275PCMAIL     Pcmail Transport Protocol                               1056MTP        Multicast Transport Protocol                            1301BSD Login  BSD Login                                               1282DIXIE      DIXIE Protocol Specification                            1249IP-X.121   IP to X.121 Address Mapping for DDN                     1236OSI-HYPER  OSI and LLC1 on HYPERchannel                            1223HAP2       Host Access Protocol                                    1221SUBNETASGN On the Assignment of Subnet Numbers                     1219SNMP-TRAPS Defining Traps for use with SNMP                        1215DAS        Directory Assistance Service                            1202LPDP       Line Printer Daemon Protocol                            1179[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Internet Architecture Board Standards Track                    [Page 39]

RFC 2400                   Internet Standards             September 19986.9.  Historic ProtocolsAll Historic protocols have Not Recommended status.Protocol   Name                                                RFC  STD========   =====================================              ===== ===IPV6-UNI   IPv6 Provider-Based Unicast Address      Elective  2073     *IPV6-Addr  IPv6 Addressing Architecture             Elective  1884     *L2F        Cisco Layer Two Forwarding Protocol                2341IPSO       DoD Security Options for IP              Elective  1108SNMPv2     Manager-to-Manager MIB                   Elective  1451SNMPv2     Party MIB for SNMPv2                     Elective  1447SNMPv2     Security Protocols for SNMPv2            Elective  1446SNMPv2     Administrative Model for SNMPv2          Elective  1445RIP        Routing Information Protocol             Ele       1058  34--------   Mapping full 822 to Restricted 822                 1137BGP3       Border Gateway Protocol 3 (BGP-3)             1267,1268--------   Gateway Requirements                      Req      1009   4EGP        Exterior Gateway Protocol                 Rec       904  18SNMP-MUX   SNMP MUX Protocol and MIB                          1227OIM-MIB-II OSI Internet Management: MIB-II                    1214IMAP3      Interactive Mail Access Protocol Version 3         1203SUN-RPC    Remote Procedure Call Protocol Version 1           1050802.4-MIP  IEEE 802.4 Token Bus MIB                           1230CMOT       Common Management Information Services             1189--------   Mail Privacy: Procedures                           1113--------   Mail Privacy: Key Management                       1114--------   Mail Privacy: Algorithms                           1115NFILE      A File Access Protocol                             1037HOSTNAME   HOSTNAME Protocol                                   953SFTP       Simple File Transfer Protocol                       913SUPDUP     SUPDUP Protocol                                     734BGP        Border Gateway Protocol                       1163,1164MIB-I      MIB-I                                              1156SGMP       Simple Gateway Monitoring Protocol                 1028HEMS       High Level Entity Management Protocol              1021STATSRV    Statistics Server                                   996POP2       Post Office Protocol, Version 2                     937RATP       Reliable Asynchronous Transfer Protocol             916HFEP       Host - Front End Protocol                           929THINWIRE   Thinwire Protocol                                   914HMP        Host Monitoring Protocol                            869GGP        Gateway Gateway Protocol                            823RTELNET    Remote Telnet Service                               818CLOCK      DCNET Time Server Protocol                          778MPM        Internet Message Protocol                           759NETRJS     Remote Job Service                                  740NETED      Network Standard Text Editor                        569Internet Architecture Board Standards Track                    [Page 40]

RFC 2400                   Internet Standards             September 1998RJE        Remote Job Entry                                    407XNET       Cross Net Debugger                              IEN-158NAMESERVER Host Name Server Protocol                       IEN-116MUX        Multiplexing Protocol                            IEN-90GRAPHICS   Graphics Protocol                             NIC-24308[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]6.10.  Obsolete Protocols   Some of the protocols listed in this memo are described in RFCs that   are obsoleted by newer RFCs.  "Obsolete" or "obsoleted" is not an   official state or status of protocols.  This subsection is for   information only.   While it may seem to be obviously wrong to have an obsoleted RFC in   the list of standards, there may be cases when an older standard is   in the process of being replaced.  This process may take a year or   two.   Many obsoleted protocols are of little interest and are dropped from   this memo altogether.  Some obsoleted protocols have received enough   recognition that it seems appropriate to list them under their   current status and with the following reference to their current   replacement.   RFC            RFC   Status     Title                               *   ====           ====  =========  =================================== =   1305 obsoletes 1119 Stan/Rec    Network Time Protocol version 2   Thanks to Lynn Wheeler for compiling the information in this   subsection.   [Note: an asterisk at the end of a line indicates a change from the   previous edition of this document.]Internet Architecture Board Standards Track                    [Page 41]

RFC 2400                   Internet Standards             September 19987.  Contacts7.1.  IAB, IETF, and IRTF Contacts   7.1.1.  Internet Architecture Board (IAB) Contact   Please send your comments about this list of protocols and especially   about the Draft Standard Protocols to the Internet Architecture Board   care of Abel Winerib, IAB Executive Director.      Contacts:         Abel Winerib         Executive Director of the IAB         Intel, JF2-64         2111 NE 25th Avenue         Hillsboro, OR 97124         1-503-696-8972         AWinerib@ibeam.jf.intel.com         Brian E. Carpenter         Chair of the IAB         IBM United Kingdon Laboratories         Hursley Park         Winchester         Hampshire SO21 2JN         +44 1962 816833         brian@hursley.ibm.com   7.1.2.  Internet Engineering Task Force (IETF) Contact      Contacts:         Fred Baker         Chair of the IETF         cisco Systems, Inc.         519 Lado Drive         Santa Barbara, CA 93111         1-805-681-0115         fred@cisco.comInternet Architecture Board Standards Track                    [Page 42]

RFC 2400                   Internet Standards             September 1998         Steve Coya         IESG Secretary         Corporation for National Research Initiatives         1895 Preston White Drive, Suite 100         Reston, VA 22091         1-703-620-8990         scoya@IETF.ORG         Steve Coya         Executive Director of the IETF         Corporation for National Research Initiatives         1895 Preston White Drive, Suite 100         Reston, VA 22091         1-703-620-8990         scoya@IETF.ORG   7.1.3.  Internet Research Task Force (IRTF) Contact      Contact:         Abel Winerib         Chair of the IRTF         Intel, JF2-64         2111 NE 25th Avenue         Hillsboro, OR 97124         1-503-696-8972         AWinerib@ibeam.jf.intel.comInternet Architecture Board Standards Track                    [Page 43]

RFC 2400                   Internet Standards             September 19987.2.  Internet Assigned Numbers Authority Contact      Contact:         Joyce K. Reynolds         Internet Assigned Numbers Authority         USC/Information Sciences Institute         4676 Admiralty Way         Marina del Rey, CA  90292-6695         1-310-822-1511         IANA@IANA.ORG   The protocol standards are managed by the Internet Assigned Numbers   Authority.   Please refer to the document "Assigned Numbers" (RFC-1700) for   further information about the status of protocol documents.  There   are two documents that summarize the requirements for host and   gateways in the Internet, "Host Requirements" (RFC-1122 andRFC-1123)   and "Requirements for IP Version 4 Routers" (RFC-1812).      How to obtain the most recent edition of this "Internet Official      Protocol Standards" memo:         The file "in-notes/std/std1.txt" may be copied via FTP from the         FTP.ISI.EDU computer using the FTP username "anonymous" and FTP         password "guest".Internet Architecture Board Standards Track                    [Page 44]

RFC 2400                   Internet Standards             September 19987.3.  Request for Comments Editor Contact      Contact:         Jon Postel         RFC Editor         USC/Information Sciences Institute         4676 Admiralty Way         Marina del Rey, CA  90292-6695         1-310-822-1511         RFC-Editor@ISI.EDU   Documents may be submitted via electronic mail to the RFC Editor for   consideration for publication as RFC.  If you are not familiar with   the format or style requirements please request the "Instructions for   RFC Authors".  In general, the style of any recent RFC may be used as   a guide.7.4.  The Network Information Center and      Requests for Comments Distribution Contact   RFCs can be obtained via FTP from FTP.ISI.EDU, with the pathname in-   notes/rfcnnnn.txt (where "nnnn" refers to the number of the RFC).   Login with FTP username "anonymous" and password "name@host.domain".   RFCs can also be obtained via electronic mail from ISI.EDU by using   the RFC-INFO service.  Address the request to "rfc-info@isi.edu" with   a message body of:           Retrieve: RFC              Doc-ID: RFCnnnn   (Where "nnnn" refers to the number of the RFC (always use 4 digits -   the DOC-ID ofRFC 822 is "RFC0822")).  The RFC-INFO@ISI.EDU server   provides other ways of selecting RFCs based on keywords and such; for   more information send a message to "rfc-info@isi.edu" with the   message body "help: help".   contact: RFC-Manager@ISI.EDUInternet Architecture Board Standards Track                    [Page 45]

RFC 2400                   Internet Standards             September 19987.5.  Sources for Requests for Comments   Details on many sources of RFCs via FTP or EMAIL may be obtained by   sending an EMAIL message to "rfc-info@ISI.EDU" with the message body   "help: ways_to_get_rfcs".  For example:           To: rfc-info@ISI.EDU           Subject: getting rfcs           help: ways_to_get_rfcs8.  Security Considerations   Security issues are not addressed in this memo.9.  Authors' Addresses   Jon Postel   USC/Information Sciences Institute   4676 Admiralty Way   Marina del Rey, CA 90292   Phone: 310-822-1511   Fax:   310-823-6714   EMail: Postel@ISI.EDU   Joyce K. Reynolds   USC/Information Sciences Institute   4676 Admiralty Way   Marina del Rey, CA 90292   Phone: 310-822-1511   Fax:   310-823-6714   EMail: JKRey@ISI.EDUInternet Architecture Board Standards Track                    [Page 46]

RFC 2400                   Internet Standards             September 1998Full Copyright Statement   Copyright (C) The Internet Society (1998).  All Rights Reserved.   This document and translations of it may be copied and furnished to   others, and derivative works that comment on or otherwise explain it   or assist in its implementation may be prepared, copied, published   and distributed, in whole or in part, without restriction of any   kind, provided that the above copyright notice and this paragraph are   included on all such copies and derivative works.  However, this   document itself may not be modified in any way, such as by removing   the copyright notice or references to the Internet Society or other   Internet organizations, except as needed for the purpose of   developing Internet standards in which case the procedures for   copyrights defined in the Internet Standards process must be   followed, or as required to translate it into languages other than   English.   The limited permissions granted above are perpetual and will not be   revoked by the Internet Society or its successors or assigns.   This document and the information contained herein is provided on an   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.Internet Architecture Board Standards Track                    [Page 47]

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