NETWORK HOST STATUS

      This RFC reports on the status of most Network Hosts from June 5
to June 16.  During this period the MIT Math Lab PDP-10 (Network
address 198) became a server.

      No testing was done on June 6 due to an attempt to install the
new IMP system.  No testing was done on June 9 as the prototype
Terminal IMP was being used for software debugging.

On June 16 the ARPA Terminal IMP (Network 156) was installed in

Arlington, Virginia.

Several Hosts are currently excluded from the daily testing.

These Hosts fall into two categories:

1) Hosts which are not 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 which are currently intended to be users only. Included here are the Terminal IMPs, which are presently in the Network (AMES, MITRE, NBS, ETAC, USC, GWC, NOAA, RADC, SAAC, BELVOIR, ARPA, and BBN*). This category also includes the Network Control Center computer (Network address 5) which is used solely for gathering statistics from the Network. Finally, included among these Hosts are the following:

          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.
________________
*The BBN Terminal IMP (Network Address 158) is a prototype and as
 such is frequently not connected to the Network, but being used
 to refine and debug the Terminal IMP programs.
  1     UCLA-NMC           O     O     O     O     O    #D     O     O
 65     UCLA-CCN*          O     O     O     O     O    #D     O     O
  2     SRI-ARC            O     D     D     O     O     O     O     O
 66     SRI-AI             O     D     T     D     D     D    #D     D
  3     UCSB-MOD75         O     O     O     O     O     O     O     O
  4     UTAH-10            0     O     O     D     D     O     D     O
 69     BBN-TENEX          D     O     O     O     O     O     O     O
133     BBN-TENEXB        #D    #D    #D    #D    #D    #D    #D    #D
  6     MIT-MULTICS        O     O     O     O     O     O     O     O
 70     MIT-DMCG           O     O     O     O     O     O     O     O
134     MIT-AI             H     H     H     H     H     H     H     H
194     MIT-ML             D     D     H     D     H     H     D     H
 71     RAND-CSG           O     D     O     D     O     O     O     O
  8     SDC-ADEPT         #D    #D    #D    #D    #D    #D    #D     D
  9     HARVARD-10         O     O     O     O    #D    #D    #D     O
 10     L.L.-360           H     D     H     D     H     H     H     H
 74     L.L.-TX-2          R    #D     O     O     O    #D     O     O
 11     STANFORD-AI        D     D     O     O     O     O     D     D
 14     CMU-10             D     O     O     O     O     T     O     O
 15     AMES-ILLIAC        T     O     O     O     D     O     O     O
 16     AMES-67            D     D     D     D     D     D     D     D

where
D = Dead (Destination Host either dead or inaccessible [due to network

partitioning or local IMP failure] from the BBN Terminal IMP.)

F = Full (Destination Host opened a connection, informed user that all

Network ports were in use, and immediately closed the connection.)

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.)

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

T = Timed out (Destination Host did not complete the ICP and open a
    connection within 60 seconds.)
_______________
*The only service currently offered by the UCLA IBM-360/91 is a Network
 Job Service (NETRJS), however, the BBN Terminal IMP is not equipped to
 test NETRJS.  We are assuming that initial connection to the NETRJS
 logger indicates that NETRJS is also functioning.
#These sites advertise that they may not have their system available at
 these times.