Consider the scenario shown below, with four different servers connected to four different clients over four three-hop paths. The four pairs share a common middle hop with a transmission capacity of R = 300 Mbps. The four links from the servers to the shared link have a transmission capacity of RS = 100 Mbps. Each of the four links from the shared middle link to a client has a transmission capacity of RC = 10 Mbps.

1. What is the maximum achievable end-end throughput (in Mbps) for each of four client-to-server pairs, assuming that the middle link is fairly shared (divides its transmission rate equally)?

2. Which link is the bottleneck link? Format as Rc, Rs, or R. Justify your answer

3. Assuming that the servers are sending at the maximum rate possible, what are the link utilizations for the server links (RS)? Show your calculations.

4. Assuming that the servers are sending at the maximum rate possible, what are the link utilizations for the client links (RC)? Show your calculations.

5. Assuming that the servers are sending at the maximum rate possible, what is the link utilization for the shared link (R)? Show your calculations.
 

 

R 100 Mbps RC= 10 Mbps RC= 10 Mbps R5 = 100 Mbps R = 300 Mbps R 100Mbps R 10 Mbps RC RS = 100Mbps TOOOD R 10 Mbps