[e2e] Some questions about TCP.

Fri Nov 27 01:19:54 PST 2009

you wanna get pathological about it, there's a small, but non zero
possibility that transmission errors caused by interference
create a packet that is a duplicate of an ack, from a completely
unrelated packet, and happen to create the right link and ip header
and tcp checksum to match....

must have happened at least once since interweb day 0, whenever that
was...

In missive <4B0D8E28.3090802 at reed.com>, "David P. Reed" typed:

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 >>Thanks, Noel. The statistics there are useful, but far from a model of 
 >>the "erasure channel" created by packet drops due to congestion in a 
 >>end-to-end congestion-controlled Internet.
 >>
 >>On 11/25/2009 02:18 PM, Noel Chiappa wrote:
 >>>      >  From: "David P. Reed"<dpreed at reed.com>
 >>>
 >>>      >  if someone would provide a model with empirical parameters that
 >>>      >  estimated the statistical probability for most cases in the network.
 >>>
 >>> Indeed; the I-D I referenced:
 >>>
 >>>    http://www.ietf.org/internet-drafts/draft-ietf-tcpm-early-rexmt-03.txt
 >>>
 >>> does include such data, and points to the sources.
 >>>
 >>> 	Noel
 >>>
 >>>    
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 >><html>
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 >><body text="#000000" bgcolor="#ffffff">
 >><font face="Helvetica, Arial, sans-serif">Thanks, Noel.&nbsp;&nbsp; </font>The
 >>statistics there are useful, but far from a model of the "erasure
 >>channel" created by packet drops due to congestion in a end-to-end
 >>congestion-controlled Internet.<br>
 >><br>
 >>On 11/25/2009 02:18 PM, Noel Chiappa wrote:
 >><blockquote cite="mid:20091125191855.CA65C6BE59A at mercury.lcs.mit.edu"
 >> type="cite">
 >>  <pre wrap="">    &gt; From: "David P. Reed" <a class="moz-txt-link-rfc2396E" href="mailto:dpreed at reed.com">&lt;dpreed at reed.com&gt;</a>
 >>
 >>    &gt; if someone would provide a model with empirical parameters that
 >>    &gt; estimated the statistical probability for most cases in the network.
 >>
 >>Indeed; the I-D I referenced:
 >>
 >>  <a class="moz-txt-link-freetext" href="http://www.ietf.org/internet-drafts/draft-ietf-tcpm-early-rexmt-03.txt">http://www.ietf.org/internet-drafts/draft-ietf-tcpm-early-rexmt-03.txt</a>
 >>
 >>does include such data, and points to the sources.
 >>
 >>	Noel
 >>
 >>  </pre>
 >></blockquote>
 >></body>
 >></html>
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 cheers

   jon