Figure Q5(a) shows an excerpt of the transmission phase of a TCP connection Copy

Question

Figure Q5(a) shows an excerpt of the transmission phase of a TCP connection Copy Table Q5 to your answer book and complete it for the message exchange. Assume the length of all the TCP headers are 20 bytes. Q5 (a) (12 marks) Client Server SYN Payload 1500 bytes 4 Payload 1800 bytes Payload 1500 bytes 800 bytes data is taken out from the buffer by application before sending this segment Payload 1800 bytes 1000 bytes data is taken out from the buffer by application before sending this segment Payload 1500 bytes FIN Figure Q5(a) /Table Q5

Explanation / Answer

a)

The answer is no.

Its is not possible that to be 2 or more TCP connectins b/w the 2 ports at exact/same time.
Reason:A pair of ports uniquely/distinctly sets up only 1 connection.

Ans:With the slow-start,
           -> 1st RTT sends 1 segment/2KB.
           -> second RTT sends 2 segments/4KB.
           -> third RTT sends 4 segment/8KB.
           -> 4th RTT sends 8 segment/16KB.
          -> 5th RTT will have sent 16 segments/32KB.
          Anyway it will exceed the window of receiever.
      So the amount of time (full window=24kb) = 4*10
                               =40 milli sec.

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