[ih] TCP adoption in 1984

[Tom Lyon]

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
> --
> Internet-history mailing list
> Internet-history at elists.isoc.org
> https://elists.isoc.org/mailman/listinfo/internet-history
> -
> Unsubscribe:
> https://app.smartsheet.com/b/form/9b6ef0621638436ab0a9b23cb0668b0b?The%20list%20to%20be%20unsubscribed%20from=Internet-history
>