Hello Steven,
That is a good pointer and explains it!!
True that,One can decrease the error probability by
employing multiple checksums,like the cases in which
errors are introduced by routers.
thanx,
--jacob
--- "Steven M. Bellovin" <smb(_at_)research(_dot_)att(_dot_)com>
wrote: > The short answer is two-fold: first, that
the TCP
checksum is
end-to-end, while the Ethernet checksum is only
hop-by-hop, and second,
that the TCP checksum detects different classes of
errors, in
particular those that occur on routers.
But all this is explained much more clearly in Stone
and Partridge's
SIGCOMM paper. Have a look at
http://citeseer.nj.nec.com/stone00when.html
for the abstract and pointers to the fuill text.
--Steve Bellovin, http://www.research.att.com/~smb
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