1. Suppose the length of each packet is L bits. Also, assume the path from a server to a client includes N links each of rate R (i.e., there are N-1 routers between the server and the client).

a. With store-and-forward packet switching, what is the end-to-end delay to transmit one packet over the N links (ignoring propagation, processing, and queueing delays)?

b. What is the delay if the server sends P such packets back-to-back over the N links?

2. A packet switch receives a packet and determines the outbound link to which the packet should be forwarded. When the packet arrives, suppose one other packet is halfway done being transmitted on this outbound link and five other packets are waiting to be transmitted. Packets are transmitted in order of arrival. If all packets are 1,500 bytes and the link rate is 20 Mbps, what is the queueing delay for the packet?