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P Flow and Congestion control (13 points) What is the main difference between the objectives of TCP's flow control and congestion control? 2 points) 2. S uppose a sender and receiver are connected by a single link of bandwidth 80 Mbits (use 1M-10 with a propagation round-trip delay of 10 ms. Further suppose that the window advertised by the receiver on its ACKs is 500 KBytes (use 1K 103) and the maximum segment size (MSS) for the network is 1500 Bytes. Assume that there is no queueing anywhere, packet transmission times are negligible, and there are zero header overheads. (a) If the sender implements a stop-and-wait reliable delivery protocol, what would its congestion window be (in Bytes)? (1 point) b) If the sender implements a pipelined reliable delivery protocol that keeps the link busy 100% of the time, what would its congestion window be (in Bytes)? (3 points) tion, in percentage, that a TCP sender can drive the link to? (2 points) (Recall that link utilization corresponds to the fraction of time that the link is kept busy with packets.) (e) Suppose the receiver started advertising a window of 50 KBytes. What is the maximum utliza