Consider the GBN protocol with a sender window size of 4 and a sequencenumber range of

Chapter 3, Problem P22

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Consider the GBN protocol with a sender window size of 4 and a sequencenumber range of 1,024. Suppose that at time t, the next in-order packet that thereceiver is expecting has a sequence number of k. Assume that the mediumdoes not reorder messages. Answer the following questions:a. What are the possible sets of sequence numbers inside the senders windowat time t? Justify your answer.b. What are all possible values of the ACK field in all possible messages currentlypropagating back to the sender at time t? Justify your answer.

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