Data networks

3) End to end throughput and bottleneck links (2 pts) 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 = 100 Mbps. The four links from the servers to the shared link have a transmission capacity of Rs = 30 Mbps. Each of the four links from the shared middle link to a client has a transmission capacity of Rc = 80 Mbps per second. 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 fair-shared (i.e., divides its transmission rate equally among the four pairs)? 2- Which link is the bottleneck link for each session? 3- Assuming that the senders are sending at the maximum rate possible, what are the link utilizations for the sender links (Rs), client links (Rc), and the middle link (R)? R= 30 R$ Tops 1 Rg moos Rs 30 Mbps R = 30 Mbps R = 100 Mbps Re: 80 Mbps R= 80 Mbps Rp= 80 Mbps R- 80 Mbps 3) End to end throughput and bottleneck links (2 pts) 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 = 100 Mbps. The four links from the servers to the shared link have a transmission capacity of Rs = 30 Mbps. Each of the four links from the shared middle link to a client has a transmission capacity of Rc = 80 Mbps per second. 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 fair-shared (i.e., divides its transmission rate equally among the four pairs)? 2- Which link is the bottleneck link for each session? 3- Assuming that the senders are sending at the maximum rate possible, what are the link utilizations for the sender links (Rs), client links (Rc), and the middle link (R)? R= 30 R$ Tops 1 Rg moos Rs 30 Mbps R = 30 Mbps R = 100 Mbps Re: 80 Mbps R= 80 Mbps Rp= 80 Mbps R- 80 Mbps