Suppose a TCP (Reno) endpoint A is in the process of sending a very large file to the other endpoint B. Assume that the MSS is 1024 bytes, the initial value of ssthresh is 32768 bytes, and the round-trip time between A and B is on average RTT=100 ms.

a. Suppose A currently has a congestion window cwnd = 16384 bytes, ssthresh = 32768 bytes. If A now receives a segment from B acknowledging new (i.e., previously unacknowledged) data, what is the updated value of cwnd? Justify your answer. 

b. How many segments from B acknowledging new data (including the one in question a) does A have to receive in order to transition to congestion avoidance? Explain your answer. 

c.  State two events that can reduce the value of ssthresh. What is the value of cwnd after each of these two events? (Assume the values of cwnd and ssthresh are the same with that in question a before the events happen) Explain your answer.

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a In the TCP Reno congestion control algorithm when a TCP endpoint receives an acknowledgment for ne... View the full answer