rfc252.txt

<VC++网络游戏建摸与实现>源代码

Network Working Group                           E. Westheimer
RFC #252                                        Bolt Beranek and Newman
NIC #7693                                       8 October 1971
Categories: F, G.3
Updates:  RFC 240
Obsoletes: None


     The purpose of this RFC is to report on the recent status of most
Network Hosts.  During September 27 through September 29 the BBN prototype
Terminal IMP (Network Address 158) was in-accessible due to hardware
debugging.  The Network was, therefore, not examined on these days.

     Three Hosts which were not officially able to act as Server's at the
time of RFC #240 are now able to do so.  These Hosts are:

NETWORK
ADDRESS         SITE                    COMPUTER
-------         ----                    --------

  2             SRI (NIC)               PDP-10
  6             MIT (Multics)           H-645
  9             HARVARD                 PDP-10

     The Harvard PDP-10, however, has limited core space.  They will,
therefore, run the Telnet program only occasionally.

     The following two tables summarize the information on the Host status
for September 30 - October 8.






















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NETWORK
ADDRESS    SITE         COMPUTER      DAY, DATE and TIME (Eastern)
-------    ----         --------      ----------------------------------
                                       Th   F    M    Tu   W    Th   F
                                      9/30 10/1 10/4 10/5 10/6 10/7 10/8
                                      1100 1530 1200 1600 1100 1300 1530

  1        UCLA          SIGMA-7        O    T    D    O    #D   O    O
*65        UCLA          IBM-360/91     O    O    D    O     D   O    O
  2        SRI (NIC)     PDP-10         O   #D    T   #T     O   T   #D
 66        SRI (AI)      PDP-10         D    D    D    D     D   D    D
  3        UCSB          IBM-360/75     D    O    O    O     O   O    O
  4        UTAH          PDP-10         D    D    D    D     D   D    D
 69        BBN (TENEX)   PDP-10         T    T    O    O     O   D    D
  6        MIT (Multics) H-645          O    O    D    T     D   T    D
 70        MIT (DM)      PDP-10         D    H    D    T     D   T    T
  8        SDC           IBM-360/67     D    D    D    D     D   D    D
  9        HARVARD       PDP-10         T    D    T    D     D   T    T
 10        LINCOLN       IBM-360/67     H    H    H    H     D   T    D

where

D = Dead. (Destination Host either dead or inaccessible [due to network
    partitioning or local IMP failure] from the BBN Terminal IMP).

R = Refused. (Destination Host returned a CLS to the initial RFC.)

T = Timed out. (Destination Host did not respond in any way to the initial
    RFC, although not dead.)

H = 1/2 Open.  (Destination Host opened a connection but then either
    immediately closed it, or did not respond any further.)

O = Open. (Destination Host opened a connection and was accessible to users.)

*  The UCLA IBM-360/91 currently has Remote Job Service (NETRJS), but has
   not implemented a full server Telnet System.  The BBN Terminal IMP is
   not equipped to test NETRJS;  however, we are assuming that receipt of
   the UCLA explanatory message indicates that NETRJS is also functioning.

#  These sites advertise that they may not have their system available at
   these time.









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                                                            "STATUS or
NETWORK                                                     PREDICTIONS"
ADDRESS   SITE          COMPUTER    STATUS or PREDICTION    OBTAINED FROM
-------   ----          --------    --------------------    -------------

  1       UCLA          SIGMA-7     Sever                   Jon Postel
 65       UCLA          IBM-360/91  Remote Job Service now, Bob Braden
                                    Telnet in April
  2       SRI (NIC)     PDP-10      Server                  John Melvin
 66       SRI (AI)      PDP-10      November                Len Chaiten
  3       UCSB          IBM-360/75  Server                  Jim White
  4       UTAH          PDP-10      "Soon"                  Barry Wessler
  5       BBN (NCC)     DDP-516     Never                   Alex McKenzie
 69       BBN (TENEX)   PDP-10      Server                  Dan Murphy
  6       MIT (Multics) H-645       Server                  Mike Padlipsky
 70       MIT (TENEX)   PDP-10      Server                  Bob Bressler
  7       RAND          IBM-360/65  User Only               Eric Harslem
 71       RAND          PDP-10      January                 Eric Harslem
  8       SDC           IBM-360/67  "Soon"                  Bob Long
  9       HARVARD       PDP-10      Server                  Bob Sundberg
 73       HARVARD       PDP-1       User only               Bob Sundberg
 10       LINCOLN       IBM-360/67  "Soon"                  Joel Winnet
 74       LINCOLN       TX2         Uncertain               Tom Barkalow
 11       STANFORD      PDP-10      November                Andy Moorer
 12       ILLINOIS      PDP-11      User Only               John Cravits
 13       CASE          PDP-10      December 15             Charles Rose
 14       CARNEGIE      PDP-10      January                 Hal VanZoeren
 15       PAOLI         B6500       Uncertain               John Cravits
144       AMES          TIP         User Only
145       MITRE         TIP         User Only
158       BBN (TIP)     Prototype   User Only
                          TIP


       [ 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   ]














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