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Network Working Group                        Internet Architecture BoardRequest for Comments: 1500                             J. Postel, EditorObsoletes: RFCs1410,1360,1280,                            August 19931250,1100,1083,1130,1140,1200STD: 1                  INTERNET 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).   Distribution of this memo is unlimited.Table of Contents   Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .21.  The Standardization Process  . . . . . . . . . . . . . . . .22.  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 . . . . . . . . . . . . . . .94.1.4.  Experimental Protocol  . . . . . . . . . . . . . . . . .94.1.5.  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  . . . . . . . . . . . . . . . . . .104.2.4.  Limited Use Protocol . . . . . . . . . . . . . . . . .104.2.5.  Not Recommended Protocol . . . . . . . . . . . . . . .105.  The Standards Track  . . . . . . . . . . . . . . . . . . .105.1.  The RFC Processing Decision Table  . . . . . . . . . . .105.2.  The Standards Track Diagram  . . . . . . . . . . . . . .126.  The Protocols  . . . . . . . . . . . . . . . . . . . . . .146.1.  Recent Changes . . . . . . . . . . . . . . . . . . . . .146.1.1.  New RFCs . . . . . . . . . . . . . . . . . . . . . . .146.1.2.  Other Changes  . . . . . . . . . . . . . . . . . . . .206.2.  Standard Protocols . . . . . . . . . . . . . . . . . . .22Internet Architecture Board                                     [Page 1]

RFC 1500                   Internet Standards                August 19936.3.  Network-Specific Standard Protocols  . . . . . . . . . .246.4.  Draft Standard Protocols . . . . . . . . . . . . . . . .256.5.  Proposed Standard Protocols  . . . . . . . . . . . . . .266.6.  Telnet Options . . . . . . . . . . . . . . . . . . . . .286.7.  Experimental Protocols . . . . . . . . . . . . . . . . .296.8.  Informational Protocols  . . . . . . . . . . . . . . . .306.9.  Historic Protocols . . . . . . . . . . . . . . . . . . .317.  Contacts . . . . . . . . . . . . . . . . . . . . . . . . .327.1.  IAB, IETF, and IRTF Contacts . . . . . . . . . . . . . .327.1.1.  Internet Architecture Board (IAB) Contact  . . . . . .327.1.2.  Internet Engineering Task Force (IETF) Contact . . . .337.1.3.  Internet Research Task Force (IRTF) Contact  . . . . .347.2.  Internet Assigned Numbers Authority (IANA) Contact . . .347.3.  Request for Comments Editor Contact  . . . . . . . . . .357.4.  Network Information Center Contact . . . . . . . . . . .357.5.  Sources for Requests for Comments  . . . . . . . . . . .368.  Security Considerations  . . . . . . . . . . . . . . . . .369.  Author's Address . . . . . . . . . . . . . . . . . . . . .36Introduction   A discussion of the standardization process and the RFC document   series is presented first, followed by an explanation of the terms.   Sections6.2 -6.9 contain the lists of protocols in each stage of   standardization.  Finally are pointers to references and contacts for   further information.   This memo is intended to be issued approximately quarterly; please be   sure the copy you are reading is current.  Current copies may be   obtained from the Network Information Center (INTERNIC) or from the   Internet Assigned Numbers Authority (IANA) (see the contact   information at the end of this memo).  Do not use this edition after   31-October-93.   SeeSection 6.1 for a description of recent changes.  In the official   lists in sections6.2 -6.9, 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.1.  The Standardization Process   The Internet Architecture Board maintains this list of documents that   define standards for the Internet protocol suite.  SeeRFC-1358 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 IESGInternet Architecture Board                                     [Page 2]

RFC 1500                   Internet Standards                August 1993   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-1310.   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 in six months.   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 areInternet Architecture Board                                     [Page 3]

RFC 1500                   Internet Standards                August 1993   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.   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 (seeInternet Architecture Board                                     [Page 4]

RFC 1500                   Internet Standards                August 1993Section 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 1111).   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.  It   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 INTERNIC, and a number of other   sites.  For more information about obtaining RFCs, see Sections7.4   and 7.5.Internet Architecture Board                                     [Page 5]

RFC 1500                   Internet Standards                August 19933.  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-1340.3.2.  Gateway Requirements   This document reviews the specifications that apply to gateways and   supplies guidance and clarification for any ambiguities.  Gateway   Requirements isRFC-1009.  A working group of the IETF is actively   preparing a revision.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 Internet community specifications for IP (RFC-791) and TCP (RFC-793) and the DoD MIL-STD specifications are intended to describe   exactly the same protocols.  Any difference in the protocols   specified by these sets of documents should be reported to DISA and   to the IESG.  The RFCs and the MIL-STDs for IP and TCP differ in   style and level of detail.  It is strongly advised that the two sets   of documents be used together, along withRFC-1122 andRFC-1123.   The Internet and the DoD MIL-STD specifications for the FTP, SMTP,   and Telnet protocols are essentially the same documents (RFCs 765,   821, 854).  The MIL-STD versions have been edited slightly.  Note   that the current Internet specification for FTP isRFC-959 (as   modified byRFC-1123).Internet Architecture Board                                     [Page 6]

RFC 1500                   Internet Standards                August 1993   Note that these MIL-STD are now somewhat out of date.  The Gateway   Requirements (RFC-1009) and Host Requirements (RFC-1122,RFC-1123)   take precedence over both earlier RFCs and the MIL-STDs.          Internet Protocol (IP)                      MIL-STD-1777          Transmission Control Protocol (TCP)         MIL-STD-1778          File Transfer Protocol (FTP)                MIL-STD-1780          Simple Mail Transfer Protocol (SMTP)        MIL-STD-1781          Telnet Protocol and Options (TELNET)        MIL-STD-1782   These documents are available from the Naval Publications and Forms   Center.  Requests can be initiated by telephone, telegraph, or mail;   however, it is preferred that private industry use form DD1425, if   possible.          Naval Publications and Forms Center, Code 3015          5801 Tabor Ave          Philadelphia, PA 19120          Phone: 1-215-697-3321 (order tape)                 1-215-697-4834 (conversation)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, not recommended) cell.Internet Architecture Board                                     [Page 7]

RFC 1500                   Internet Standards                August 1993                             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.4.1.  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.Internet Architecture Board                                     [Page 8]

RFC 1500                   Internet Standards                August 1993   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.   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.Internet Architecture Board                                     [Page 9]

RFC 1500                   Internet Standards                August 1993   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.5.  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.Internet Architecture Board                                    [Page 10]

RFC 1500                   Internet Standards                August 1993      +==========================================================+      |**************|               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.      (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 minorInternet Architecture Board                                    [Page 11]

RFC 1500                   Internet Standards                August 1993   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                                    [Page 12]

RFC 1500                   Internet Standards                August 1993         |         +<----------------------------------------------+         |                                               ^         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                                    [Page 13]

RFC 1500                   Internet Standards                August 19936.  The Protocols   Subsection 6.1 lists recent RFCs and other changes.  Subsections6.2   - 6.9 list the standards in groups by protocol state.6.1.  Recent Changes6.1.1.  New RFCs:      1501 - OS/2 User Group             This is an information document and does not specify any             level of standard.      1500 - This memo.      1499 - Not yet issued.      1498 - On the Naming and Binding of Network Destinations             This is an information document and does not specify any             level of standard.      1497 - BOOTP Vendor Information Extensions             This memo is a status report on BOOTP types and is a part             of the BOOTP specification which is currently a Draft             Standard.      1496 - Rules for Downgrading Messages from X.400/88 to X.400/84             When MIME Content-Types are Present in the Messages             A Proposed Standard protocol.      1495 - Mapping between X.400 andRFC-822 Message Bodies             A Proposed Standard protocol.      1494 - Equivalences between 1988 X.400 andRFC-822 Message Bodies             A Proposed Standard protocol.      1493 - Definitions of Managed Objects for Bridges             A Draft Standard protocol.Internet Architecture Board                                    [Page 14]

RFC 1500                   Internet Standards                August 1993      1492 - An Access Control Protocol, Sometimes Called TACACS             This is an information document and does not specify any             level of standard.      1491 - A Survey of Advanced Usages of X.500             This is an information document and does not specify any             level of standard.      1490 - Multiprotocol Interconnect over Frame Relay             A Draft Standard protocol.      1489 - Registration of a Cyrillic Character Set             This document defines a character set, and is referenced by             "Assigned Numbers" (STD 2).      1488 - The X.500 String Representation of Standard             Attribute Syntaxes             A Proposed Standard protocol.      1487 - X.500 Lightweight Directory Access Protocol             A Proposed Standard protocol.      1486 - An Experiment in Remote Printing             An Experimental protocol.      1485 - A String Representation of Distinguished Names (OSI-DS 23             (v5))             A Proposed Standard protocol.      1484 - Using the OSI Directory to achieve User Friendly             Naming (OSI-DS 24 (v1.2))             An Experimental protocol.      1483 - Multiprotocol Encapsulation over ATM Adaptation Layer 5             A Proposed Standard protocol.Internet Architecture Board                                    [Page 15]

RFC 1500                   Internet Standards                August 1993      1482 - Aggregation Support in the NSFNET Policy-Based Routing             Database             This is an information document and does not specify any             level of standard.      1481 - IAB Recommendation for an Intermediate Strategy to Address             the Issue of Scaling             This is an information document and does not specify any             level of standard.      1480 - The US Domain             This is an information document and does not specify any             level of standard.      1479 - Inter-Domain Policy Routing Protocol Specification:             Version-1             A Proposed Standard protocol.      1478 - An Architecture for Inter-Domain Policy Routing             A Proposed Standard protocol.      1477 - IDPR as a Proposed Standard             This is an information document and does not specify any             level of standard.      1476 - RAP: Internet Route Access Protocol             An Experimental protocol.      1475 - TP/IX: The Next Internet             An Experimental protocol.      1474 - The Definitions of Managed Objects for the Bridge Network             Control Protocol of the Point-to-Point Protocol             A Proposed Standard protocol.      1473 - The Definitions of Managed Objects for the IP Network             Control Protocol of the Point-to-Point Protocol             A Proposed Standard protocol.Internet Architecture Board                                    [Page 16]

RFC 1500                   Internet Standards                August 1993      1472 - The Definitions of Managed Objects for the Security             Protocols of the Point-to-Point Protocol             A Proposed Standard protocol.      1471 - The Definitions of Managed Objects for the Link Control             Protocol of the Point-to-Point Protocol             A Proposed Standard protocol.      1470 - FYI on a Network Management Tool Catalog: Tools for             Monitoring and Debugging TCP/IP Internets and             Interconnected Devices             This is an information document and does not specify any             level of standard.      1469 - IP Multicast over Token-Ring Local Area Networks             A Proposed Standard protocol.      1468 - Japanese Character Encoding for Internet Messages             This document defines a character set, and is referenced by             "Assigned Numbers" (STD 2).      1467 - Status of CIDR Deployment in the Internet             This is an information document and does not specify any             level of standard.      1466 - Guidelines for Management of IP Address Space             This is an information document and does not specify any             level of standard.      1465 - Routing Coordination for X.400 MHS Services Within a Multi             Protocol / Multi Network Environment Table Format V3 for             Static Routing             An Experimental protocol.      1464 - Using the Domain Name System To Store Arbitrary String             Attributes             An Experimental protocol.Internet Architecture Board                                    [Page 17]

RFC 1500                   Internet Standards                August 1993      1463 - FYI on Introducing the Internet-- A Short Bibliography of             Introductory Internetworking Readings             This is an information document and does not specify any             level of standard.      1462 - FYI on "What is the Internet?"             This is an information document and does not specify any             level of standard.      1461 - SNMP MIB extension for Multiprotocol Interconnect over X.25             A Proposed Standard protocol.      1460 - Post Office Protocol - Version-3             A Draft Standard protocol.      1459 - Internet Relay Chat Protocol             An Experimental protocol.      1458 - Requirements for Multicast Protocols             This is an information document and does not specify any             level of standard.      1457 - Security Label Framework for the Internet             This is an information document and does not specify any             level of standard.      1456 - Conventions for Encoding the Vietnamese Language - VISCII:             VIetnamese Standard Code for Information Interchange  -             VIQR: VIetnamese Quoted-Readable Specification             This document defines a character set, and is referenced by             "Assigned Numbers" (STD 2).      1455 - Physical Link Security Type of Service             An Experimental protocol.      1454 - Comparison of Proposals for Next Version of IP             This is an information document and does not specify any             level of standard.Internet Architecture Board                                    [Page 18]

RFC 1500                   Internet Standards                August 1993      1453 - A Comment on Packet Video Remote Conferencing and the             Transport/Network Layers             This is an information document and does not specify any             level of standard.      1452 - Coexistence between version-1 and version-2 of the             Internet-standard Network Management Framework             A Proposed Standard protocol.      1451 - Manager-to-Manager Management Information Base             A Proposed Standard protocol.      1450 - Management Information Base for version-2 of the Simple             Network Management Protocol (SNMPv2)             A Proposed Standard protocol.      1449 - Transport Mappings for version-2 of the Simple Network             Management Protocol (SNMPv2)             A Proposed Standard protocol.      1448 - Protocol Operations for version-2 of the Simple Network             Management Protocol (SNMPv2)             A Proposed Standard protocol.      1447 - Party MIB for version-2 of the Simple Network Management             Protocol (SNMPv2)             A Proposed Standard protocol.      1446 - Security Protocols for version-2 of the Simple Network             Management Protocol (SNMPv2             A Proposed Standard protocol.      1445 - Administrative Model for version-2 of the Simple Network             Management Protocol (SNMPv2)             A Proposed Standard protocol.      1444 - Conformance Statements for version-2 of the Simple Network             Management Protocol (SNMPv2)Internet Architecture Board                                    [Page 19]

RFC 1500                   Internet Standards                August 1993             A Proposed Standard protocol.      1443 - Textual Conventions for version-2 of the Simple Network             Management Protocol (SNMPv2)             A Proposed Standard protocol.      1442 - Structure of Management Information for version-2 of the             Simple Network Management Protocol (SNMPv2)             A Proposed Standard protocol.      1441 - Introduction to version-2 of the Internet-standard Network             Management Framework             A Proposed Standard protocol.      1440 - SIFT/UFT: Sender-Initiated/Unsolicited File Transfer             An Experimental protocol.      1439 - The Uniqueness of Unique Identifiers             This is an information document and does not specify any             level of standard.      1438 - Internet Engineering Task Force Statements Of Boredom             (SOBs)             This is an information document and does not specify any             level of standard.      1437 - The Extension of MIME Content-Types to a New Medium             This is an information document and does not specify any             level of standard.6.1.2.  Other Changes:   The following are changes to protocols listed in the previous   edition.      1298 - SNMP over IPX             Obsoleted by 1420.Internet Architecture Board                                    [Page 20]

RFC 1500                   Internet Standards                August 1993      1284 - Definitions of Managed Objects for the Ethernet-like             Interface Types             Moved to Historic.      1283 - SNMP over OSI             Obsoleted by 1418.      1214 - "OSI Internet Management: Management Information Base             Moved to Historic.      1203 - Interactive Mail Access Protocol - Version-3             Moved to Historic.      1201 - Transmitting IP Traffic over ARCNET Networks             Moved to Historic.      1094 - NFS: Network File System Protocol Specification             Moved to Informational.      1057 - RPC: Remote Procedure Call Protocol Specification Version-2             Moved to Informational.RFC 1050 - RPC: Remote Procedure Call Protocol Specification             Moved to Historic.Internet Architecture Board                                    [Page 21]

RFC 1500                   Internet Standards                August 19936.2.  Standard ProtocolsProtocol   Name                                      Status    RFC STD *========   =====================================     ======== ==== === =--------   Internet Official Protocol Standards      Req      1500   1--------   Assigned Numbers                          Req      1340   2--------   Host Requirements - Communications        Req      1122   3--------   Host Requirements - Applications          Req      1123   3--------   Gateway Requirements                      Req      1009   4IP         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  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  17EGP        Exterior Gateway Protocol                 Rec       904  18NETBIOS    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  33RIP        Routing Information Protocol              Ele      1058  34TP-TCP     ISO Transport Service on top of the TCP   Ele      1006  35[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Internet Architecture Board                                    [Page 22]

RFC 1500                   Internet Standards                August 1993Applicability 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 developing 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".Internet Architecture Board                                    [Page 23]

RFC 1500                   Internet Standards                August 19936.3.  Network-Specific Standard ProtocolsAll Network-Specific Standards have Elective status.Protocol   Name                                    State    RFC   STD *========   =====================================   =====   =====  === =IP-FDDI    Transmission of IP and ARP over FDDI Net Std    1390    36IP-HIPPI   IP and ARP on HIPPI                      Prop   1374IP-X.25    X.25 and ISDN in the Packet Mode         Prop   1356IP-SMDS    IP Datagrams over the SMDS Service       Prop   1209ARP        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     Internet Protocol on ARCNET              Std    1051    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    49[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                                    [Page 24]

RFC 1500                   Internet Standards                August 19936.4.  Draft Standard ProtocolsProtocol   Name                                     Status          RFC========   =====================================    ============== =====BRIDGE-MIB BRIDGE-MIB                               Elective       1493*IP-FR      Multiprotocol over Frame Relay           Prop           1490*ETHER-MIB  Ethernet MIB                             Elective       1398NTPV3      Network Time Protocol (Version 3)        Elective       1305IP-MTU     Path MTU Discovery                       Elective       1191FINGER     Finger Protocol                          Elective       1288BGP3       Border Gateway Protocol 3 (BGP-3)        Elective  1267,1268OSPF2      Open Shortest Path First Routing V2      Elective       1247POP3       Post Office Protocol, Version 3          Elective       1460*IP-FDDI    Internet Protocol on FDDI Networks       Elective       1188PPP        Point to Point Protocol                  Elective       1171BOOTP      Bootstrap Protocol                      Recommended 951,1497*NICNAME    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                                    [Page 25]

RFC 1500                   Internet Standards                August 19936.5.  Proposed Standard ProtocolsProtocol   Name                                     Status          RFC========   =====================================    ============== =====HARPOON    Rules for Downgrading Messages...        Elective       1496*Mapping    MHS/RFC-822 Message Body Mapping         Elective       1495*Equiv      X.400/MIME Body Equivalences             Elective       1494*X.500syn   X.500 String Representation ...          Elective       1488*X.500lite  X.500 Lightweight ...                    Elective       1487*STR-REP    String Representation ...                Elective       1485*OSI-Dir    OSI User Friendly Naming ...             Elective       1484*ATM-ENCAP  Multiprotocol Encapsulation over ATM     Elective       1483*IDPR       Inter-Domain Policy Routing Protocol     Elective       1479*IDPR-ARCH  Architecture for IDPR                    Elective       1478*PPP/Bridge MIB Bridge PPP MIB                       Elective       1474*PPP/IP MIB  IP Network Control Protocol of PPP MIB  Elective       1473*PPP/SEC MIB Security Protocols of PPP MIB           Elective       1472*PPP/LCP MIB Link Control Protocol of PPP MIB        Elective       1471*IP-TR-MC   IP Multicast over Token-Ring LANs        Elective       1469*X25-MIB    Multiprotocol Interconnect on X.25 MIB   Elective       1461*SNMPv2     Coexistence between SNMPv1 and SNMPv2    Elective       1452*SNMPv2     Manager-to-Manager MIB                   Elective       1451*SNMPv2     Management Information Base for SNMPv2   Elective       1450*SNMPv2     Transport Mappings for SNMPv2            Elective       1449*SNMPv2     Protocol Operations for SNMPv2           Elective       1448*SNMPv2     Party MIB for SNMPv2                     Elective       1447*SNMPv2     Security Protocols for SNMPv2            Elective       1446*SNMPv2     Administrative Model for SNMPv2          Elective       1445*SNMPv2     Conformance Statements for SNMPv2        Elective       1444*SNMPv2     Textual Conventions for SNMPv2           Elective       1443*SNMPv2     SMI for SNMPv2                           Elective       1442*SNMPv2     Introduction to SNMPv2                   Elective       1441*SMTP-SIZE  SMTP Service Ext for Message Size        Elective       1427SMTP-8BIT  SMTP Service Ext or 8bit-MIMEtransport   Elective       1426SMTP-EXT   SMTP Service Extensions                  Elective       1425PEM-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       1403Internet Architecture Board                                    [Page 26]

RFC 1500                   Internet Standards                August 1993--------   Route Advertisement In BGP2 And BGP3     Elective       1397RIP2-MIB   RIP Version 2 MIB Extension              Elective       1389RIP2       RIP Version 2-Carrying Additional Info.  Elective       1388SNMP-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       1377PP-DNCP    PPP DECnet Phase IV Control Protocol     Elective       1376802.3-MIB  IEEE 802.3 Repeater MIB                  Elective       1368BGP-OSPF   BGP OSPF Interaction                     Elective       1364TABLE-MIB  IP Forwarding Table MIB                  Elective       1354SNMP-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       1349-------    Representation of Non-ASCII Text         Elective       1342MIME       Multipurpose Internet Mail Extensions    Elective       1341PPP-AUTH   PPP Authentication                       Elective       1334PPP-LINK   PPP Link Quality Monitoring              Elective       1333PPP-IPCP   PPP Control Protocol                     Elective       1332PPP        Point-to-Point Protocol (PPP)            Elective       1331-------    X.400 1988 to 1984 downgrading           Elective       1328-------    Mapping between X.400(1988)              Elective       1327TCP-EXT    TCP Extensions for High Performance      Elective       1323-------    Def. Man. Objs Parallel-printer-like     Elective       1318-------    Def. Man Objs RS-232-like                Elective       1317-------    Def. Man. Objs. Character Stream         Elective       1316FRAME-MIB  Management Information Base for Frame    Elective       1315NETFAX     File Format for the Exchange of Images   Elective       1314SIP-MIB    SIP Interface Type MIB                   Elective       1304IARP       Inverse Address Resolution Protocol      Elective       1293DECNET-MIB DECNET MIB                               Elective       1289FDDI-MIB   FDDI-MIB                                 Elective       1285-------    Encoding Network Addresses               Elective       1277-------    Replication and Distributed Operations   Elective       1276-------    COSINE and Internet X.500 Schema         Elective       1274RMON-MIB   Remote Network Monitoring MIB            Elective       1271BGP-MIB    Border Gateway Protocol MIB (Version 3)  Elective       1269ICMP-ROUT  ICMP Router Discovery Messages           Elective       1256OSPF-MIB   OSPF Version 2 MIB                       Elective       1253IPSO       DoD Security Options for IP              Elective       1108AT-MIB     Appletalk MIB                            Elective       1243OSI-UDP    OSI TS on UDP                            Elective       1240STD-MIBs   Reassignment of Exp MIBs to Std MIBs     Elective       1239OSI-NSAP   Guidelines for OSI NSAP Allocation       Elective       1237IPX-IP     Tunneling IPX Traffic through IP Nets    Elective       1234802.5-MIB  IEEE 802.5 Token Ring MIB                Elective       1231GINT-MIB   Extensions to the Generic-Interface MIB  Elective       1229Internet Architecture Board                                    [Page 27]

RFC 1500                   Internet Standards                August 1993PPP-EXT    PPP Extensions for Bridging              Elective       1220IS-IS      OSI IS-IS for TCP/IP Dual Environments   Elective       1195IP-CMPRS   Compressing TCP/IP Headers               Elective       1144ISO-TS-ECHO Echo for ISO-8473                       Elective       1139-------    Mapping Between X.400(1984)              Elective   1026,987NNTP       Network News Transfer Protocol           Elective        977[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]Applicability Statements:   OSPF -RFC 1370 is an applicability statement for OSPF.6.6.  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  Prop  Ele     652TOPT-OHT   Output Horizontal Tabstops         11  Prop  Ele     653TOPT-OHTD  Output Horizontal Tab Disposition  12  Prop  Ele     654TOPT-OFD   Output Formfeed Disposition        13  Prop  Ele     655TOPT-OVT   Output Vertical Tabstops           14  Prop  Ele     656TOPT-OVTD  Output Vertical Tab Disposition    15  Prop  Ele     657TOPT-OLD   Output Linefeed Disposition        16  Prop  Ele     658TOPT-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     927Internet Architecture Board                                    [Page 28]

RFC 1500                   Internet Standards                August 1993TOPT-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  Prop  Ele    1408TOPT-AUTH  Telnet Authentication Option       37  Exp   Ele    1416TOPT-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.]6.7.  Experimental ProtocolsAll Experimental protocols have the Limited Use status.Protocol   Name                                                     RFC========   =====================================                   =====REM-PRT    An Experiment in Remote Printing                        1486*RAP        Internet Route Access Protocol                          1476*TP/IX      TP/IX: The Next Internet                                1475*X400       Routing Coordination for X.400 Services                 1465*DNS        Storing Arbitrary Attributes in DNS                     1464*IRCP       Internet Relay Chat Protocol                            1459*TOS-LS     Link Security TOS                                       1455*SIFT/UFT   Sender-Initiated/Unsolicited File Transfer              1440*DIR-ARP    Directed ARP                                            1433TEL-SPX    Telnet Authentication: SPX                              1412TEL-KER    Telnet Authentication: Kerberos V4                      1411MAP-MAIL   X.400 Mapping and Mail-11                               1405TRACE-IP   Traceroute Using an IP Option                           1393DNS-IP     Experiment in DNS Based IP Routing                      1383DNS NSAP   DNS NSAP RRs                                            1348RMCP       Remote Mail Checking Protocol                           1339MSP2       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                     1235SNMP-DPI   SNMP Distributed Program Interface                      1228SNMP-MUX   SNMP MUX Protocol and MIB                               1227IP-AX.25   IP Encapsulation of AX.25 Frames                        1226ALERTS     Managing Asynchronously Generated Alerts                1224Internet Architecture Board                                    [Page 29]

RFC 1500                   Internet Standards                August 1993MPP        Message Posting Protocol                                1204ST-II      Stream Protocol                                         1190SNMP-BULK  Bulk Table Retrieval with the SNMP                      1187DNS-RR     New DNS RR Definitions                                  1183NTP-OSI    NTP over OSI Remote Operations                          1165EHF-MAIL   Encoding Header Field for Mail                          1154DMF-MAIL   Digest Message Format for Mail                          1153RDP        Reliable Data Protocol                              908,1151--------   Mapping between X.400(88) andRFC-822                   1148TCP-ACO    TCP Alternate Checksum Option                           1146--------   Mapping full 822 to Restricted 822                      1137IP-DVMRP   IP Distance Vector Multicast Routing                    1075TCP-LDP    TCP Extensions for Long Delay Paths                     1072IMAP2      Interactive Mail Access Protocol                   1176,1064VMTP       Versatile Message Transaction Protocol                  1045COOKIE-JAR Authentication Scheme                                   1004NETBLT     Bulk Data Transfer Protocol                              998IRTP       Internet Reliable Transaction Protocol                   938AUTH       Authentication Service                                   931LDP        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.]6.8.  Informational ProtocolsInformation protocols have no status.Protocol   Name                                                     RFC=======    ====================================                    =====TACACS     Terminal Access Control Protocol                        1492*SUN-NFS    Network File System Protocol                            1094*SUN-RPC    Remote Procedure Call Protocol Version 2                1057*GOPHER     The Internet Gopher Protocol                            1436-------    Data Link Switching: Switch-to-Switch Protocol          1434LISTSERV   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                     1219Internet Architecture Board                                    [Page 30]

RFC 1500                   Internet Standards                August 1993SNMP-TRAPS Defining Traps for use with SNMP                        1215DAS        Directory Assistance Service                            1202MD4        MD4 Message Digest Algorithm                            1186LPDP       Line Printer Daemon Protocol                            1179[Note: an asterisk at the end of a line indicates a change from theprevious edition of this document.]6.9.  Historic ProtocolsAll Historic protocols have Not Recommended status.Protocol   Name                                                     RFC=======    =====================================                   =====OIM-MIB-II OSI Internet Management: MIB-II                         1214*IMAP3      Interactive Mail Access Protocol Version 3              1203*IP-ARC     Transmitting IP Traffic over ARCNET Nets                1201*SUN-RPC    Remote Procedure Call Protocol Version 1                1050*802.4-MIP  IEEE 802.4 Token Bus MIB                                1230CMOT       Common Management Information Services                  1189PPP-INIT   PPP Initial Configuration Options                       1172MSP        Message Send Protocol                                   1159--------   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                             569RJE        Remote Job Entry                                         407XNET       Cross Net Debugger                                   IEN-158NAMESERVER Host Name Server Protocol                            IEN-116Internet Architecture Board                                    [Page 31]

RFC 1500                   Internet Standards                August 1993MUX        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.]7.  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 Bob Braden, IAB Executive Director.      Contacts:         Bob Braden         Executive Director of the IAB         USC/Information Sciences Institute         4676 Admiralty Way         Marina del Rey, CA  90292-6695         1-310-822-1511         Braden@ISI.EDU         Christian Huitema         Chair of the IAB         INRIA, Sophia-Antipolis         2004 Route des Lucioles         BP 109         F-06561 Valbonne Cedex         France         +33 93 65 77 15         Christian.Huitema@MIRSA.INRIA.FRInternet Architecture Board                                    [Page 32]

RFC 1500                   Internet Standards                August 1993   7.1.2.  Internet Engineering Task Force (IETF) Contact      Contacts:         Phill Gross         Chair of the IETF         Advanced Network and Services         100 Clearbrook Road         Elmsford, NY  10523         1-914-789-5300         PGross@ANS.NET         John Stewart         IESG Secretary         Corporation for National Research Initiatives         1895 Preston White Drive, Suite 100         Reston, VA 22091         1-703-620-8990         jstewart@CNRI.RESTON.VA.US         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@CNRI.RESTON.VA.USInternet Architecture Board                                    [Page 33]

RFC 1500                   Internet Standards                August 1993   7.1.3.  Internet Research Task Force (IRTF) Contact      Contact:         Jon Postel         Chair of the IRTF         USC/Information Sciences Institute         4676 Admiralty Way         Marina del Rey, CA  90292-6695         1-310-822-1511         Postel@ISI.EDU7.2.  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@ISI.EDU   The protocol standards are managed by the Internet Assigned Numbers   Authority.   Please refer to the document "Assigned Numbers" (RFC-1340) 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 "Gateway Requirements" (RFC-1009).      How to obtain the most recent edition of this "Internet Official      Protocol Standards" memo:         The file "in-notes/internet-standards.txt" may be copied via         FTP from the VENERA.ISI.EDU computer using the FTP username         "anonymous" and FTP password "guest".Internet Architecture Board                                    [Page 34]

RFC 1500                   Internet Standards                August 19937.3.  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      RFC's may be obtained from DS.INTERNIC.NET via FTP, WAIS, and      electronic mail.  Through FTP, RFC's are stored as rfc/rfcnnnn.txt      or rfc/rfcnnnn.ps where 'nnnn' is the RFC number.  Login as      "anonymous" and provide your e-mail address as the password.      Through WAIS, you may use either your local WAIS client or telnet      to DS.INTERNIC.NET and login as "wais" (no password required) to      access a WAIS client.  Help information and a tutorial for using      WAIS are available online.  The WAIS database to search is "rfcs".      Directory and Database Services also provides a mail server      interface.  Send a mail message to mailserv@ds.internic.net and      include any of the following commands in the message body:         document-by-name rfcnnnn      where 'nnnn' is the RFC number                                       The text version is sent.         file /ftp/rfc/rfcnnnn.yyy     where 'nnnn' is the RFC number.                                       and 'yyy' is 'txt' or 'ps'.         help                          to get information on how to use                                       the mailserver.      The InterNIC directory and database services collection of      resource listings, internet documents such as RFCs, FYIs, STDs,      and Internet Drafts, and publicly accessible databases are alsoInternet Architecture Board                                    [Page 35]

RFC 1500                   Internet Standards                August 1993      now available via Gopher.  All our collections are WAIS indexed      and can be searched from the Gopher menu.      To access the InterNIC Gopher Servers, please connect to      "internic.net" port 70.      Contact: admin@ds.internic.net7.5.  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.  Author's Address   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.EDUInternet Architecture Board                                    [Page 36]

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