Network Working Group
NIC # 11118
RFC # 376
Categories: F, G.3
Updates: RFC #370
Obsoletes: None
Ellen Westheimer
8 August 1972


This RFC reports on the status of most Network Hosts from

July 31 to August 4.

     Several Hosts are currently excluded from the daily testing
as they are presently intended to be users only.  Included here
are the Terminal IMPs, which are presently in the Network (AMES,
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

     Address                  Site                 Computer
     -------                  ----                 --------
         7                    Rand                 IBM-360/65
        73                    Harvard              PDP-1
       138                    Lincoln              TSP
        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.

NOTE: Ellen Westheimer left BBN to return to school on August 4.
We therefore will discontinue the publication of these summaries.
It is my understanding that UCLA-NMC is considering the publica-
tion of similar, although more detailed, survey data in the near
future; I hope that data will serve in lieu of these reports.  In
addition, of course, MIT-DMCG has had survey information available
on line for some time (see RFC #308, NIC 9259.)
                                                 - Alex McKenzie -
*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.


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.)

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.

       [ This RFC was put into machine readable form for entry ]
       [ into the online RFC archives by BBN Corp. under the   ]
       [ direction of Alex McKenzie.                      1/97 ]