Compare Go-Back N (GBN) and Selective Repeat (SR). Assume that the timeout values for the two...

 

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Compare Go-Back N (GBN) and Selective Repeat (SR). Assume that the timeout values for the two protocols are sufficiently long such that 5 consecutive data frames 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 frames to Host B, and the 2nd frame (sent from A) is lost. In the end, all 5 data frames have been correctly received by Host B. a) How many frames has Host A sent in total and how many frames has Host B sent in total? What are their sequence numbers? Answer this question for the two protocols. Explain your solution in detail (you may draw a schematic for each protocol to assist you in your explanation). b) If the timeout values for each of the two protocols are much longer than 5 round- trip times (RTT), then which protocol successfully delivers all five data frames in shortest time interval? Compare Go-Back N (GBN) and Selective Repeat (SR). Assume that the timeout values for the two protocols are sufficiently long such that 5 consecutive data frames 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 frames to Host B, and the 2nd frame (sent from A) is lost. In the end, all 5 data frames have been correctly received by Host B. a) How many frames has Host A sent in total and how many frames has Host B sent in total? What are their sequence numbers? Answer this question for the two protocols. Explain your solution in detail (you may draw a schematic for each protocol to assist you in your explanation). b) If the timeout values for each of the two protocols are much longer than 5 round- trip times (RTT), then which protocol successfully delivers all five data frames in shortest time interval?