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Network Working Group                        Peggy KarpRequest for Comments:  #247                  MITRENIC 7688                                     12 October 1971Categories:  Policy, TelnetRelated:  #226, 236, 239, 233, 237Obsoletes:  #226Proferred Set of Standard Host Names   In RFC #226, BBN's TENEX list of Host names was set up as a strawman   set of standard Host names.  Comments received since then (an RFC   actually generated comments!!!) have influenced me to propose the   following general rules for forming Host names.   The Host names will be 8 characters in length.  The general form is                     <site>  '-'  <machine>   <site> will be at most 4 characters, formed as follows:        (a)  Use the keyword in the site name, if not more than             four characters, e.g., NASA Ames, Case Western             Reserve.                    ----  ----        (b)  Use the standard acronym, if not more than four             characters, e.g., UCLA, RADC, NBS.        (c)  If a standard abbreviation exists, use it, e.g., Ill.        (d)  If none of the above apply, use the first four letters             in the site name, e.g., Burr, Mitr, Harv.        (e)  If none of the above is acceptable to the site, the             technical liaison should select the site mnemonic.   <machine> will be at most 4 characters of the form <mfg. #>   <designator>.   Examples of mfg. # are:             IBM 360             2 digit model number             IBM 370             3 digit model number             PDP                 1 - 2 digit model number             Burroughs           4 digits             CDC                 4 digits             etc.                                                                [Page 1]

RFC #247   <designator> will be used when more than one machine of the same   type is located at a site (e.g., 2 PDP-10s at MIT, at SRI, and   at BBN).   Limiting <machine> to 4 characters does not permit distinctions   to be made between machines with 4 digit mfg.  #s.  I expect   the situation will be handled in an ad hoc manner by the NIC if   it arises.   TIPs are identified as 'TIP' rather than by '316'.  If a Host   is not to be permanently addressable, the machine is identified   as 'TEST'.   A list of Host names, formed according to these rules, is   attached.  Alternate Host names should be provided, as   suggested by Jon Postel (RFC #236).  RFC's 206, 233, and   236 present lists with 4-character alternate names.  The   Technical Liaison should select the alternate name for his   site and communicate the selection to the NIC.   The preceding rules and the attached list of Host names are   subject to the approval of the NWG.  Hereafter, the list will   be generated and maintained by the NIC in cooperation with   the Technical Liaison at each site, as suggested in RFC #237.   Comments should be addressed to Dick Watson.         [ This RFC was put into machine readable form for entry ]         [ into the online RFC archives by BBN Corp. under the   ]         [ direction of Alex McKenzie.                   12/96   ]                                                                [Page 2]

RFC #247Attachment 1          NETWORK ADDRESS                 STANDARD NAME          ---------------                 -------------                   1                      UCLA-7                  65                      UCLA-91                   2                      SRI-10NI                  66                      SRI-10AI                   3                      UCSB-75                   4                      UTAH-10                   5                      BBN-516                  69                      BBN-10A                 133                      BBN-10B                   6                      MIT-645                  70                      MIT-10DM                 134                      MIT-10AI                   7                      RAND-65                  71                      RAND-10                   8                      SDC-75                   9                      HARV-10                  73                      HARV-1                 137                      HARV-11                  10                      LL-67                  74                      LL-TX2                 138                      LL-TSP                  11                      SAIL-10                  12                      ILL-11                  76                      ILL-6500                  13                      CASE-10                  14                      CMU-10                  15                      BURR-6500                  79                      BURR-TEST                  16                      AMES-67                 144                      AMES-TIP                 145                      MITR-TIP                  18                      RADC-645                 146                      RADC-TIP                  19                      NBS-11                 147                      NBS-TIP                 148                      ETAC-TIP                  21                      TINK-418                  22                      MCCL-418                  23                      USC-44                 151                      USC-TIP                 152                      GWC-TIP                  25                      NCAR-7600                 153                      NCAR-TIP                 158                      BBNX-TEST                                                                [Page 3]

RFC #247Attachment 2                  An Implementation SchemeIf the standard Host names are formed according to the proposedrules, the following implementation scheme, suggested by SteveCrocker, can be used.        Map <site> into an 8-bit number, S and        map <machine> into an 8-bit number, M,        where                  S + M = Network Address.        S and M can be selected such that specification of <site>        alone could cause a default to the "primary" Host at        the site.  Note that this scheme depends on a unique        <site> designator for each IMP.Some examples:If the "primary" Host at UCLA is the 91, let        UCLA  -> S = X'41'           7  -> M = X'40'          91  -> M = X'00'then for        UCLA-7, S + M = X'01' = 1 base 10        UCLA-91,S + M = X'41' = 65 base 10and        UCLA alone = X'41' = 65 base 10If the primary Host at BBN is TENEX System A, let        BBN  ->  S = X'45'        516  ->  M = X'40'        10A  ->  M = X'00'        10B  ->  M = X'C0'then for        BBN-516, S + M = X'05' = 5 base 10        BBN-10A, S + M = X'45' = 69 base 10        BBN-10B, S + M = X'85' = 133 base 10and        BBN alone = X'45' = 69 base 10The primary Host for each IMP would be designated by thesite and such information disseminated by the NIC.                                                                [Page 4]