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<b style="color: rgb(0, 0, 0); font-family: Times; font-size:
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initial;">Mel Beckman</b><span style="color: rgb(0, 0, 0);
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!important; float: none;"><span> </span></span><a
href="mailto:nanog%40nanog.org?Subject=Re%3A%20Network%20visibility&In-Reply-To=%3C3F9A10AF-090C-410A-96BC-CEF1B0371B3C%40beckman.org%3E"
title="Network visibility" style="font-family: Times; font-size:
medium; font-style: normal; font-variant-ligatures: normal;
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word-spacing: 0px; -webkit-text-stroke-width: 0px;">mel at
beckman.org</a> wrote:<br>
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<pre style="white-space: pre-wrap; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">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.
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This is just so completely wrong as to be ludicrous. <br>
<br>
First of all, the IMP was the box. Computers connected using the
protocols specified in BBN Report 1822
(<a class="moz-txt-link-freetext" href="https://walden-family.com/impcode/BBN1822_Jan1976.pdf">https://walden-family.com/impcode/BBN1822_Jan1976.pdf</a>)<br>
<br>
NCP was alternately referred to as the Network Control PROGRAM and
the Network Control Protocol. It essentially played the role of
TCP, managing pairs of simplex connections. <br>
<br>
Routing was completely dynamic - that was the whole point of the IMP
software. And routing did NOT require email addresses - those
operated much further up the protocol stack.<br>
<br>
Perhaps you're confusing this with UUCP mail addressing ("bang"
paths). Or possibly BITNET or FidoNet - which I believe also were
source routed (but memory fails on that.<br>
<br>
re. <br>
<blockquote type="cite">
<pre style="white-space: pre-wrap; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Even so, the Internet as a platform open to anyone didn’t start until 1992. I know you joined late, in 1999, so you probably missed out on this history. :)</pre>
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You know, there are people on this list who were back there in 1969,
and actually wrote some of that code - so you might want to stop
spouting nonsense. (Not me, I was a user, starting in 1971, didn't
get to BBN until 1985 - when we were still dealing with stragglers
who didn't quite manage to cutover to TCP/IP on the Flag Day.)<br>
<br>
<pre class="moz-signature" cols="72">--
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</pre>
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