[ih] IMP PSN 7 (was: History from 1960s to 2025 (ARPANET to TCP))

[Andrew G. Malis]

Bill,

That was very different, and about ten years earlier. It expanded the
number of IMPs that could be addressed, and the number of ports that could
be supported on an IMP. See RFC 704 (
https://datatracker.ietf.org/doc/html/rfc704) for more details.

Cheers,
Andy


On Sun, Jan 4, 2026 at 4:22 PM William Westfield <westfw at mac.com> wrote:

>
> 1977 to 1990  ...  During that time, the internal mechanisms of the IMP
> “subnet" changed significantly.
>
>
> Was that the “96bit leader” stuff that happened 1979/1980ish, or was that
> a different issue?
>
> BillW
>
>