[ih] TCP adoption in 1984

[Bob Purvy]

"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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