Compare GoBackN, SelectiveRepeart and TCP $($no delayed ACK$).$

Assume that the timeout values for all three protocols are sufficiently long such that $5$ consecutive data segments and their corresponding ACKs can be received $($if not lost in the channel$)$ by the receiving host $($Host B$)$ and the sending host $($Host A$)$ respectively.

Suppose Host A sends $5$ data segments to Host B$,$ and the $2$nd segment $($sent from A$)$ is lost. In the end, all $5$ data segments have been correctly received by Host B$.$

How many segments has Host A sent in total and how many ACKs has Host B sent in total? What are their sequence numbers and ACK numbers respectively? Answer this question for all three protocols.

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If the timeout values for all three protocols are much longer than $5$ RTT$,$ then which protocol successfully delivers all five data segments in shortest time intervals? Explain the reason.

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