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In go back 5, if every 7th packet that is being transmitted is lost and if we have to send 10 packets, then how many transmissions are required____.

I’m getting 15 but the given answer is 14
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THE ANSWER IS 14.

THE WINDOW SIZE IS 5.

NO.OF PACKETS TO SEND IS 10.

SO THE FIRST 5 PACKETS WILL BE SEND SUCCESSFULLY. (1,2,3,4,5)

NEXT,THE REM PKTS(6,7,8,9,10) WILL BE SEND. IN THAT 7TH PKT FAILED. SO THE REMAINING PKTS GET DISCARDED.ONLY 6TH PKT IS SEND SUCCESSFULLY.

SO, THE REM PKTS(7,8,9,10) IS SEND IN NEXT ROUND SUCCESSFULLY.SO TOTALLY (1,2,3,4,5,6,7X,8D,9D,10D,7,8,9,10 [X=FAIL,D=DISCARDED]) 14 TRANSMISSION OCCURS.

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