Give some details of how you might augment the sliding window protocol with flow control by having ACKs carry additional information that reduces the SWS as the receiver runs out of buffer space.

Illustrate your protocol with a timeline for a transmission; assume the initial SWS and RWS are 4, the link speed is instantaneous, and the receiver can free buffers at the rate of one per second (i.e., the receiver is the bottleneck). Show what happens at T = 0, T =

1,...,T = 4 seconds.