A network comprises of 5 serial links with transmission rates 1Mbps, 2Mbps, 100Mbps, 2Mbps, 1Mbps in that order. (a) (2 points) What is the maximum possible throughput on this network (Ignore propagation delay, queuing delay, processing delays)? (b) (2 points) If the middle link drops to 3Mbps, what will be the throughput of the network?

(c) (3 points) If there are 200 other connections passing through the 100Mbps link, each with a 1Mbps bottleneck link, and if each of these connections transmits simultaneously, the network will slow down. What is the cause of this slow-down amongst the following reasons: Transmission speed of each packet reduces, Queuing delay increases, Propagation delay increases.