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Let us say that the window size of a given TCP session is 1200 bytes and the initial sequence number is 512, Assume that the

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Answer #1

Initial sequence number is 512. and the expectational acknowledge number is 0

A 400 byte segment is sent from host A to Host B then acknowledgment number sent back to host A is (512 + 400) 912

Another 400 bytes segment is sent from host A to Host B but the segment is lost,so that the acknowledge number remains same.

for the last 400 bytes segment that has been sent from Host A to Host B the sequence number is 912.

And the acknowledgment number sent back to Host B is 1312

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