Network visibility

Miles Fidelman mfidelman at
Thu Oct 21 18:00:53 UTC 2021

Me... 67.

I arrived as an MIT Freshman, about a month before Ray Tomlinson sent 
the first ARPANET email (1971), and then about 15 years later had an 
office next to him at BBN.  I was at BBN when the guy in the next office 
pulled the plug on the ARPANET.

(And... just because the topic of network management systems started 
this whole thing, my name is on the Architecture document for DDN 
Network Management.)

Barry Shein (bzs) was the guy who finally pushed NSF into allowing 
commercial traffic (he was running "The World" - the first service to 
provide public access to the backbone).

Miles Fidelman

Kain, Becki (.) wrote:
> How old are all you people?
> 😊
> (JK)
> -----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
> WARNING: This message originated outside of Ford Motor Company. Use caution when opening attachments, clicking links, or responding.
>> 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.
> Owen

In theory, there is no difference between theory and practice.
In practice, there is.  .... Yogi Berra

Theory is when you know everything but nothing works.
Practice is when everything works but no one knows why.
In our lab, theory and practice are combined:
nothing works and no one knows why.  ... unknown

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