in Computer Networks
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1 vote
1 vote

 

Kindly help

in Computer Networks
176 views

1 Answer

3 votes
3 votes

Timer for frame 5 is expired which means either it did not receive by the receiver or did not may be acknowledgement lost .

In go back N we resend the window if the timer is expired.

So we have send till 9th frame. so we resend all the frames in the window from 5 to 9.

5th frame is lost we have to send it anyway so only option D have 5 as viable option so correct answer is D.