[Info-vax] Reading Gordon Bell's VAX strategy document

Lars Brinkhoff lars.spam at nocrew.org
Thu Sep 28 02:09:38 EDT 2023


Johnny Billquist wrote:
> Dan Cross wrote:
>>> In fact, were there any [VAXen] at all on the ARPANET before the
>>> 1983 flag day?
>> Almost certainly.  The initial TCP/IP implementation work for Unix
>> was being done at BBN at the time, and I imagine that meant VAXen
>> connected to ARPANET.

I meant VAX machines talking the NCP protocol.

> Well, before flag day, ARPANET wasn't speaking TCP/IP...

Yet, there were experiments with TCP long before the flag day so it's
not a 100% either/or situation.  I get the feeling (but I have no
evidence handy) some subset of nodes got started using TCP before NCP
was shut down.  On several occasions in 1982 (and maybe earlier?) BBN
arranged for NCP "brown-outs" to encourage speedy development.



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