[ih] IEN's as txt
vint at google.com
Fri Feb 10 03:05:50 PST 2017
Danny Cohen, Jon Postel and David Reed (MIT) all press for the IP split and
creation of UDP. Also, add to packet voice, packet video - Steve Casner at
ISI worked on both.
Keep in mind that the Internet layer sat on top of a bunch of independent
networks whose performance properties varied greatly. The satellite net
had a synchronous satellite round trip delay; packet radio was variable and
lossy; ethernet was fast but potentially lossy, ARPANET was slow (50 kb/s)
but fairly reliable. So the IP and TCP mechanisms had to work for a range
of operating points.
Some of the rationale for various choices can be found in published papers.
The SNMP choice came from a contentious three-alternative debate that was
resolved and written up as an RFC. IENs were melded into RFCs eventually as
the Internet went from an experiment to something we indnded to rely upon.
The first TCP spec was published as an IEN and as RFC 675 if memory serves.
Jack's summary of the rapid shifts led to the TCP/IP split of TCP/IP v3 and
TCP/IP v4. Note we even tried IPv5 for streaming but abandoned as it did
not seem to scale well.
On Fri, Feb 10, 2017 at 1:09 AM, Stephen Casner <casner at acm.org> wrote:
> On Thu, 9 Feb 2017, Jack Haverty wrote:
> > TCP isn't the best choice for voice. Various ARPA projects (e.g., Steve
> > Casner's work at ISI) wanted to experiment with voice coding and
> > protocols, but it wouldn't work well over TCP.
> > That was one motivation for the splitting apart of TCP and IP; it
> > permitted UDP to ride on top of IP in parallel with TCP.
> Credit Danny Cohen for that push, sparked by Bob Kahn's support of the
> packet voice idea.
> -- Steve
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> internet-history at postel.org
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