Consider the scenario shown in Figure 1 in which a server is connected to a router
by a 100Mbps link with a 50ms propagation delay. Initially this router is also
connected to two routers, each over a 25Mbps link with a 200ms propagation delay.
A 1Gbps link connects a host and a cache (if present) to each of these routers and we
assume that this link has 0 propagation delay. All packets in the network are 20,000
bits long