Wireshark-users: [Wireshark-users] question about TCP flow behavior

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From: Boaz Galil <boaz20@xxxxxxxxx>
Date: Fri, 16 Apr 2010 05:12:21 -0400

Dear Experts,

 

I am trying to review a TCP flow using wire shark (I have removed the “relative seq for TCP”).

My questions are this:

During the TCP flow I see the following:

Server A sends Server B [PSH,ACK] seq=1058555096 ACK=2917173962

Server B sends Server A [ACK] seq=2917173962 ACK=1058555108

Server A sends Server B [PSH,ACK] seq=1058555108, ACK=2917173962

Server B sends Server A [ACK] seq=2917173962 ACK=1058556516

And so on, so Server B always sends ACK on a sequence with higher number…

Does anyone know what the explanation of this behavior is? Is this a normal TCP flow behavior?

 

Please don’t hesitate to contact me if you have any questions or comments.

Thanks in advance,

 

Boaz Galil



--
Boaz.