Compare GBN, SR 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 2ndsegment (sent from A) is lost. In the end, all 5 segments have been correctly received byHost B.[10marks]a.How many segments has Host A sent in total and how many ACKs has Host B sent in total? What are their sequence numbers? Answer this question for all three protocols. b.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 interval?