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" <[EMAIL PROTECTED]>
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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