[ih] how big was the host file

[Craig Partridge]

I pulled up my ARPANET map collection.  The map does not show how many
connections were at each IMP, but you can make some informed guesses.

In September 1983 (pre-MILNET split), there are multiple sites with
multiple IMPs.  I'm guessing that we typically used up all the IMP ports
before giving someone another IMP.  So...

ISI had three IMPs.  SRI had three IMPs.  SAC had two IMPs. ARPA had two.
Those are additions to your list of Stanford, MIT, UCLA and BBN.

Thanks,

Craig

PS: The map reading led to a trivia question -- which locations were the
last ones to use IMPs with the old Honeywell hardware.... (NYC, NSA, Texas,
and TYM [I don't recall who TYM was]).  This per the April 1983 map.

On Thu, Feb 6, 2020 at 7:03 AM John Day via Internet-history <
internet-history at elists.isoc.org> wrote:

> Then I was wrong. 64 was just IMP numbers. Ports were separate.
>
> How many IMPs have multiple hosts?  Stanford, MIT, BBN, UCLA, I know. Who
> else?
>
> John
>
> > On Feb 6, 2020, at 08:40, Lars Brinkhoff <lars at nocrew.org> wrote:
> >
> > John Day wrote:
> >> Lars Brinkhoff wrote:
> >>> An MIT hosts file from 1973 was 134 lines.
> >> Why was it so large?
> >>
> >> There certainly weren’t 134 hosts on the ’Net in 1973.  Wasn’t the
> >> maximum number then still 64?
> >
> > Sorry, I see now the file has two lists.  The first list is in
> > alphabetical order, and the second is in numerical-ish order.
> >
> > There are 66 unique host numbers, of which 14 are TIPs.
>
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