RFC 344

Network Host Status

πŸ“… published May 1972, from ietf

RFC 344: Network Host Status ✨

Okay bestie, this is RFC 344 πŸ¦‹ and it's a status report. Here's the title block, the important stuff first:

  • Series: Network Working Group πŸ’–
  • RFC number: 344 πŸŽ€
  • Author: Ellen Westheimer, BBN πŸ’…
  • NIC number: #10423
  • Date: 22 May 1972 πŸ“…
  • Categories: F, G.3
  • Updates: RFC #342 πŸ”₯
  • Obsoletes: None

What This RFC Covers

This RFC reports on the status of most Network Hosts from May 8 to May 19 🌸. No testing happened on May 15 because they tried installing the new IMP system that day πŸ™ˆ.

During this stretch, the PDP-10 of the MIT Artificial Intelligence Group (Network address 134) and the PDP-10 at Stanford (Network address 11) both became Network Servers πŸ‘‘βœ¨.

Some Hosts are currently excluded from the daily testing πŸ’€. They fall into two categories:

  1. Hosts that aren't expected to be functioning on the Network as servers (available for use from other sites) on a regular basis for at least two weeks 🧚. The only Host in this category is the PDP-10 at Case (Network address 13).
  2. Hosts that are currently intended to be users only πŸ’œ. This includes the Terminal IMPs currently on the Network (AMES, MITRE, NBS, ETAC, USC, GWC, and BBN*). It also includes the Network Control Center computer (Network address 5), which is used solely for gathering statistics from the Network πŸ“Š. And finally, these Hosts are in this group too:
   Network
   Address              Site                   Computer
   -------              ----                   --------
      7                Rand                    IBM-360/65
     73                Harvard                 PDP-1
     12                Illinois                PDP-11
     19                NBS                     PDP-11
     23                USC                     IBM-360/44

The tables on the next two pages summarize the Host status for this period πŸ“.

*The BBN Terminal IMP (Network Address 158) is a prototype, so it's frequently not connected to the Network. It's being used to refine and debug the Terminal IMP programs πŸ› οΈ.

The Status Table

Here's the big status rundown, straight from the source 🌈:

"STATUS OR
 SITE                                                     PREDICTIONS
ADDRESS  SITE         COMPUTER    STATUS OR PREDICTION  OBTAINED FROM
-------  ----         --------    -------------------   -------------
   1     UCLA         SIGMA-7     Server #Limited       Jon Postel
  65     UCLA         IBM-360/91  NETRJS now            Bob Braden
                                  (Telnet in June)
   2     SRI(NIC)     PDP-10      Server                Jim White
  66     SRI(AI)      PDP-10      Server                Len Chaiten
   3     UCSB         IBM-360/75  Server                Ron Stoughton
   4     UTAH         PDP-10      Server                Barry Wessler
  *5     BBN(NCC)     DDP-516     Never                 Alex McKenzie
  69     BBN(TENEX-A) PDP-10      Server                Dan Murphy
 133     BBN(TENEX-B) PDP-10      Server(Exper.)        Dan Murphy
   6     MIT(Multics) H-645       Server                Mike Padlipsky
  70     MIT(DM)      PDP-10      Server                Bob Bressler
 134     MIT(AI)      PDP-10      Server                Jeff Rubin
  *7     RAND         IBM-360/65  User Only             Eric Harslem
  71     RAND         PDP-10      Server                Eric Harslem
   8     SDC          IBM-370/155 Server                Bob Long
   9     HARVARD      PDP-10      Server                Bob Sundberg
 *73     HARVARD      PDP-1       User Only             Bob Sundberg
  10     LINCOLN      IBM-360/67  "Soon"                Joel Winett
  74     LINCOLN      TX-2        Server                Will Kantrowitz
  11     STANFORD     PDP-10      Server                Andy Moorer
 *12     ILLINOIS     PDP-11      User Only             John Cravits
 *13     CASE         PDP-10      June                  Charles Rose
  14     CARNEGIE     PDP-10      Server                Hal VanZoeren
  15     AMES         ILLIAC      Server                John McConnell
                      (B6500)
  16     AMES         IBM-360/67  "Soon"                Wayne Hathaway
*144     AMES         TIP         User Only
*145     MITRE        TIP         User Only
 *19     NBS          PDP-11      User Only             Robert Rosenthal
*147     NBS          TIP         User Only
*148     ETAC         TIP         User Only
 *23     USC          IBM-360/44  User Now              James Pepin
*151     USC          TIP         User Only
*152     GWC          TIP         User Only
*158     BBN          TIP         User Only
                      (Prototype)
______________
*Host not included in daily testing.
#The NMC is a research site and would like to have prior arrangement
with each user.

The Test Schedule πŸ—“οΈ

This next table shows what each site did on each test date and time (Eastern) ⏰:

SITE
 NO.     SITE                      DATE AND TIME (EASTERN)
----     ----                      -----------------------
                    5/8   5/9   5/10  5/11  5/12  5/16  5/17  5/18  5/19
                    1630  1300  1730  1630  1300  1300  1600  1400  1300
  1     UCLA-NMC      T     D     O     H     H     D     O     O     O
 65     UCLA-CCN*     O     O     O     O     O     O     O     O     O
  2     SRI-ARC       O     O     D     O     O     O     O     O     O
 66     SRI-AI        D     D     D     D     D     D     D     D     D
  3     UCSB-MOD75    O     O     O     O     O     O     O     O     O
  4     UTAH-10       O     O     H     O     D     O     D     O     O
 69     BBN-TENEX     O     O     O     O     O     O     O     O     O
133     BBN-TENEXB   #T     O    #T    #T    #T    #T    #D     O     O
  6     MIT-MULTICS   O     D     O     O     O     O     O     D     H
 70     MIT-DMCG      F     O     O     O     O     F     O     F     O
134     MIT-AI        T     H     H     H     H     H     H     H     H
 71     RAND-CSG      D     H     O     O     O     O     D     D     D
  8     SDC-ADEPT     D    #D     D     D     D    #D    #D    #D    #D
  9     HARVARD-10    O     O    #D     O     O     O     O     O     O
 10     L.L.-360      T     D     D     D     H     D     H     H     H
 74     L.L.-TX-2     T     D     O     O     O     D    #D     O     R
 11     STANFORD-AI   T     D     D     T     T     H     D     D     D
 14     CMU-10        D     D     O     O     O     O     O     O     O
 15     AMES-ILLIAC   D     D     T     T     D     D     T     T     T
 16     AMES-67       D     D     D     D     D     D     D     D     D

Legend πŸ”‘

Here's what the codes mean, so you can read the tables like a pro 🧠:

  • D = Dead. The Destination Host is either dead or inaccessible (due to network partitioning or local IMP failure) from the BBN Terminal IMP πŸ’€.
  • F = Full. The Destination Host opened a connection, told the user that all Network ports were in use, and immediately closed the connection 😭.
  • H = 1/2 Open. The Destination Host opened a connection but then either immediately closed it, or didn't respond any further πŸ™ƒ.
  • O = Open. The Destination Host opened a connection and was accessible to users ✨.
  • R = Refused. The Destination Host returned a CLS to the initial RFC 🚫.
  • T = Timed out. The Destination Host didn't complete the ICP and open a connection with 60 seconds ⏳.

Footnotes πŸ“

  • * The only service currently offered by the UCLA IBM-360/91 is a Network Job Service (NETRJS). However, the BBN Terminal IMP isn't equipped to test NETRJS, so we're assuming that an initial connection to the NETRJS logger means NETRJS is also functioning 🧐.
  • # These sites advertise that they may not have their system available at these times πŸ™ˆ.
           [This RFC was put into machine readable form for entry]
       [into the online RFC archives by BBN Corp. Alex McKenzie 12/96]

🫢 That's the whole tea, bestie. Periodt. πŸ’…

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