2. A packet switch receives a packet and determines the outbound link to which the packet should be forwarded. When the packet arrives, one other packet is done (75%) being transmitted on this outbound link and 23 other packets are waiting to be transmitted. Packets are transmitted in order of arrival. Suppose all packets are 1,200 bytes and the link rate is 2 Mbps. What is the queuing delay for the packet? (30 points)

3. Suppose two hosts, A and B, are separated by 12,000 kilometers and are connected by a direct link of R = 7.5 Mbps. Suppose the propagation speed over the link is 2.410⁸ meters/sec. (30 points)

(a) Consider sending a file of 2,000,000 bits from Host A to Host B. Suppose the file is sent continuously as one large message. What is the maximum number of bits that will be in the link at any given time?

(b) What is the width (in meters) of a bit in the link?