Suppose there are 3 packets to be sent out at the sender. During the transmission, the second packet is lost. All other packets and ACKs are received correctly. We assume the packet transmission takes 2 minutes, the RTT is 20 minutes, the timer is 35 minutes. Draw a diagram to illustrate the packet and ACK transmission sequence and the specific time for each packet receiving and ACK receiving using..

(a) stop-and-wait protocol

(b) Go-back-N protocol with N=3.

Note: draw two diagrams. one for (a) and one for (b)

Example of diagram

sender receiver kt0 acko okt1 ack okt0 rcv pkt0 send ack(0 rcv ack0 send pkt1 rcv pktl send ack1 rcv ack1 send pkt0 rcv pkt0 send ack0 ac