[e2e] Some questions about TCP.

Yoshifumi Nishida nishida at sfc.wide.ad.jp
Mon Nov 23 01:51:33 PST 2009


From: Detlef Bosau <detlef.bosau at web.de>
Subject: Re: [e2e] Some questions about TCP.
Date: Mon, 23 Nov 2009 00:04:14 +0100
Message-ID: <4B09C36E.8020202 at web.de>

 > However, my problem is: When it is possible for a sender, to have the
 > same packet acknowledged by several packets from the peer, not to
 > mistake these for e.g. da Triple Duplicate Acknowledgement, which will
 > cause the sender to go into fast retransmission and fast recovery?

A sender can know which packets are already transmitted, which are not.
If the ack indicates that all transmitted packets are received, it is not a dupack
which might be a sign for packet loss.
Yoshifumi Nishida
nishida at sfc.wide.ad.jp

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