Network visibility

Kain, Becki (.) bkain1 at
Thu Oct 21 16:04:12 UTC 2021

How old are all you people?



-----Original Message-----
From: NANOG < at> On Behalf Of Owen DeLong via NANOG
Sent: Thursday, October 21, 2021 11:43 AM
To: bzs at
Cc: nanog at
Subject: Re: Network visibility

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> On Oct 20, 2021, at 14:19 , bzs at wrote:
> On October 20, 2021 at 16:08 mel at (Mel Beckman) wrote:
>> Mark,
>> Before 1983, the ARPANET wasn’t an internet, let alone The Internet. 
>> Each ARPANET connection required a host-specific interface (the 
>> “IMP”) and simplex Network Control Protocol (NCP). NCP used users' 
>> email addresses, and routing had to be specified in advance within each NCP message.

I think you mean before 1982.

TCP/IP was deployed starting in 1982. NCP was deprecated (removed from the
ARPANET) January 1, 1983, but TCP/IP was implemented (and deployed) prior to that.

> Then again there were IMPs fitted to various systems like TOPS-10, 
> ITS, Vax/BSD Unix, IBM370, etc.
> So was that really all that different from ethernet vs, oh, wi-fi or 
> fiber today, you needed an adapter?

It really wasn’t, but even if you just want to count from TCP/IP forward, 1983 isn’t the correct date. 1983 was when we turned off NCP. It wasn’t when we turned on TCP/IP. The turn on of TCP/IP occurred over several months, so there’s no particular date that can be assigned to it.


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