Questions about RTT

[samira afzal <afzal.samira () gmail com>]

Hi every one,

I have some questions about RTT. I am using wireshark 2.2.4.
1) I am going to plot RTT vs.sequence numbers. I found statistics -> i/o
graph or statistics -> tcp stream graphs -> round trip time. However in
both the RTT is vs. time and not versus sequence numbers. Is there any way
to plot RTT vs. sequence numbers?

2) I wish to add a column with RTT. Could you please guide me?

3) I am transferring a file from server to client  over TCP. It is running
locally over loop-back interface (127.0.0.1). When i checked   RTT vs.
time. I saw some large RTT values. It is strange for me. because it is
running locally so there is not any congestion between sender and receiver
so why there are some large RTT?


4) In the explained scenario in question 3,  I plotted RTT vs. time and
also statistics -> tcp stream graphs -> throughput to see segment size vs.
time. I see that whenever RTT is high the segment value is zero. Could you
 please explain me what is the reason?

Thanks in advance.

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