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Cite Danny Cohen video

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Brian E Carpenter
2024-04-21 14:07:34 +12:00
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1. Introduction and Foreword/Why version 6.md
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@@ -12,7 +12,10 @@ Maybe we should start by asking why IPv4 was version 4. Stated simply,
that was because version 0 was never used, and versions 1 through 3
were assigned during the evolution from ARPANET to TCP/IP. So version 4
was the next number available for use in
[RFC791](https://www.rfc-editor.org/info/rfc791).
[RFC791](https://www.rfc-editor.org/info/rfc791). A rather more subtle
explanation is given by the late Danny Cohen, one of the pioneers involved,
at 38 minutes and 26 seconds into the video
[A Brief Prehistory of Voice over IP](http://www.securitytube.net/video/1978).
So why not IPv5? The answer is quite simple. The number 5 in the version
field of the IP header was already assigned for what was called the