Suppose that node A wants to send 2 packets worth of data to node B. At the sender, the packets are generated at a rate of 1 packet every 1 ms. Assume that there is no delay in generating acknowledgments at the receiver. The propagation delay from A to B and from B to A is 2 ms. The transport layers of both nodes use a reliable transfer protocol with a window size of 2 at the sender and the receiver. Assume that timers used by the sender expires after 4 ms.

1) Suppose that packet number 1 is lost. If GBN is used, after how many ms will packet 1 arrive at the receiver?

2) Suppose that packet number 1 is lost. If GBN is used, after how many ms will packet 2 arrive at the receiver? (choose all that apply)

(1,2,3,4,5,6,7,8,9,10,11,12,13,14)

3) Suppose that packet number 2 is lost. If GBN is used, after how many ms will packet 2 arrive at the receiver?

4) Suppose that packet number 1 is lost. If SR is used, after how many ms will packet 1 arrive at the receiver?

5) Suppose that packet number 1 is lost. If SR is used, after how many ms will packet 2 arrive at the receiver? (choose all that apply)

(1,2,3,4,5,6,7,8,9,10,11,12,13,14)

6) Suppose that packet number 2 is lost. If SR is used, after how many ms will packet 2 arrive at the receiver?