[e2e] end2end-interest Digest, s/Vol 53, Issue 10 / sacred cows, sacre bleu/
touch at ISI.EDU
Thu Jul 10 14:50:29 PDT 2008
Jon Crowcroft wrote:
> speaking of sacred cows,
> why are their source addresses in IP Packets?
The same reason letters have return addresses; for errors (e.g., ICMPs).
Not all errors signal the transport layer; some signal the network
layer (e.g., too-big, redirect, etc.)
PS - burying them in the TCP header eats option space from TCP, which
isn't exactly in abundance either ;-)
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