Network Working Group Ellen Westheimer
Request for Comments: 344 BBN
NIC #10423 22 May 1972
Categories: F, G.3
Updates: RFC #342
NETWORK HOST STATUS
This RFC reports on the status of most Network Hosts from
May 8 to May 19. No testing was done on May 15 due to the attempt
to install the new IMP system on that day.
During this interval the PDP-10 of the MIT Artificial
Intelligence Group (Network address 134) and the PDP-10 at
Stanford (Network address 11) each became Network Servers.
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
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, 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:
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.
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
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 with 60 seconds.)
[This RFC was put into machine readable form for entry]
[into the online RFC archives by BBN Corp. Alex McKenzie 12/96]