Ethereal-users: [Ethereal-users] Things Happening In The Same Timestamp

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From: Becky Vict <becky_vict@xxxxxxxxx>
Date: Thu, 25 May 2006 02:46:36 -0700 (PDT)
Hello ethereal community.

I need help in explaining the capture I get. I'm downloading a file from an FTP server and I'm noticing a weird thing which is - in the exact same timestamp I get data packet transmission from server and a dupack from client. In another instance, out-of-order from server is followed by dupack from client also in the same timestamp.  And another instance which is even worse, TCP segment lost is followed by dupack and then retransmission all happening in the same timestamp (server-client-server). Even TCP window update comes in two, coming twice from client in the same timestamp (is this duplicated packet?)

How is this possible? Is there something wrong?

I'm using ethereal V 0.10.13 and winpcap 3.1.
OS is XP Pro SP 1 both client and server.

I hope I have given a clear picture of my problem.

Thank you in advance.

BV

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