B Figure for problem 5. 5. (20 points) Suppose that A is connected to B via a direct link. A is able to accept and transmit one packet per second (this includes transfer time and propagation delay) in each direction (both directions are independent). Assume A and B use the sliding window protocol with SWS=4 RWS=2, timeout of 4 sec, cumulative acknowledgments (no ACKS are sent on duplicated or out- of-order frames), and the MaxSeaNum is infinite. If a timeout occurs on node A while an ACK is received, the ACK will be processed first. Otherwise, if a timeout occurs on node A, the packet that timed-out will be re-sent immediately, even if there are other packets in the sender buffer allowed to be sent. If there are multiple packets allowed to be sent in the sender buffer, the sender will send the packet with the lowest packet number first. Complete the following timeline and clearly mark (as shown in class) the current content of the sender and receiver windows, when and which packet is received by B, when and which ACK is received by A, and when and which packet times out at A if: Node A is sending 7 packets (packets 1 through 7) to node B; the first packet (packet # 1) transmitted from A to B is B lost. time 0 sec A X 1 sec 2 2 sec 3 sec 4 sec 5 sec 6 sec 7 sec 8 sec 9 sec 10 sec 11 sec 12 sec