[ih] Fwd: TCP adoption in 1984

[Tom Lyon]

forgot to copy list

---------- Forwarded message ---------
From: Tom Lyon <pugs78 at gmail.com>
Date: Sat, May 2, 2026 at 4:27 PM
Subject: Re: [ih] TCP adoption in 1984
To: Bob Purvy <bpurvy at gmail.com>


Oh, yes. TCP/IP/Ethernet were always the core supported protocols.

On Sat, May 2, 2026 at 4:12 PM Bob Purvy <bpurvy at gmail.com> wrote:

> "Sun announced 10Mb Ethernet product on 4/15/83;  SunOS 1.0, based on
> 4.2BSD Beta, formally shipped in November of 1983.  There were also some
> sizeable 3Mb Ethernet sites before that.
> *So, lots of TCP over Ethernet,* "
>
> does that follow? was Sun running TCP then?
>
> On Sat, May 2, 2026 at 4:05 PM Tom Lyon <pugs78 at gmail.com> wrote:
>
>> Sun announced 10Mb Ethernet product on 4/15/83;  SunOS 1.0, based on
>> 4.2BSD Beta, formally shipped in November of 1983.  There were also some
>> sizeable 3Mb Ethernet sites before that.
>> So, lots of TCP over Ethernet, but who knows how many were actually on
>> the Arpanet?
>> BTW, I recall there was plenty of TCP over 10Mb Ethernet even before the
>> ARP protocol came out.
>>
>> On Sat, May 2, 2026 at 3:26 PM Bob Purvy via Internet-history <
>> internet-history at elists.isoc.org> wrote:
>>
>>> Grok's estimate is that about 900 hosts could be reached via TCP, at the
>>> end of 1984. RFC 984 for TCP over Ethernet was in April of that year.
>>>
>>> Were these *entirely* university and research machines? Were any of them
>>> actually running TCP on Ethernet? Does anyone know"
>>>
>>> Thanks,
>>>
>>> Bob
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>>