(a) Construct an example where an entire window of TCP packets are lost when the window size reaches 2 during the first slow start. Show how TCP responds to the losses at the packet level using the time diagram (see the example given in class). Sketch the sliding window at the sender side. Note the time epochs when TCP changes phases.

(b) Then construct another example where the ACK for the second packet is lost. Show how TCP responds by plotting CWND(t) as a function of time. Note the time epochs when TCP changes phases.

(c) Consider additive increase. Assume no loss event occurs. We know that for the time increment to be 1RTT, CWND(t)=CWND(t-1RTT)+1 MSS, where MSS is Maximum Segment Size. Now consider the time increment to be one ACK. Obtain an iterative equation that is equivalent to Equation (1). Illustrate your result using an example that CWND(t-1RTT)=5.