[ih] Correct name for early TCP/IP working group?

[John Day]

This brings up the question, when did IMPs cease to be front-end+router and at least some of them become just routers?

I know that we started to think of them that way long before they actually were that way, if they were.

Take care,
John

> On Jan 25, 2025, at 09:43, vinton cerf via Internet-history <internet-history at elists.isoc.org> wrote:
> 
> Thanks for that, Andy - I had not realized that this was used as a
> scaffolding - must have affected routing in some way and created a kind of
> gateway IMP notion for IMPs lying along a border between two connected
> subsets?
> 
> v
> 
> 
> On Sat, Jan 25, 2025 at 9:28 AM Andrew G. Malis via Internet-history <
> internet-history at elists.isoc.org> wrote:
> 
>> Jack,
>> 
>> - There was some work however within the ARPANET IMP software to
>>> acknowledge the need for multiple networks.   For example, some of the
>>> formats of data as it passed through the ARPANET included fields
>>> labelled "Network Number".  AFAIK this was never actually fully
>>> implemented so the ARPANET itself never achieved connectivity between
>>> multiple networks until TCP was deployed.
>> 
>> 
>> As I recall, the ARPANET's "network number" field was used during the
>> ARPANET/MILNET split to allow logical separation of the IMPs and hosts
>> sharing the same backbone infrastructure until the physical split could be
>> completed.
>> 
>> Cheers,
>> Andy
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