Wireshark-dev: [Wireshark-dev] Regarding time taken by 3 way handshake for creation a TCP conne

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From: "Naveen Kumar Duniwal" <Naveen.Duniwal@xxxxxxxxxxxx>
Date: Thu, 14 Aug 2008 12:41:47 +0530
Title: Regarding time taken by 3 way handshake for creation a TCP connection

Hi

I am having a problem in understanding "time taken by 3 way handshake for creation a TCP connection". Please look at following wireshark frames.

No      Time            Source                  Destination             Protocol        Info

"1",    "0.000000",     "192.168.131.41",       "192.168.133.157",      "TCP",          "sacred > http [SYN] Seq=0 Win=65535 Len=0 MSS=1360"

"2",    "0.406250",     "192.168.133.157",      "192.168.131.41",       "TCP",          "http > sacred [SYN, ACK] Seq=0 Ack=1 Win=5840 Len=0 MSS=1460"

"3",    "0.406250",     "192.168.131.41",       "192.168.133.157",      "TCP",          "sacred > http [ACK] Seq=1 Ack=1 Win=65535 Len=0"

"4",    "0.406250",     "192.168.131.41",       "192.168.133.157",      "HTTP",         "GET / HTTP/1.1"

There is a network latency of 100ms set between my Source (192.168.131.41) and Destination(192.168.133.157). Since this is a 3 step process so I assumed that it will take atleast 100ms in each of the step , but the above observation doesn't support it, where time diff between Ist and IInd frame is around 400 ms and rest of the timestamps are same.

Could you please advice me what I am doing wrong in this.

Thanks in advance.

Regards
Naveen