Q9. (4 marks) The figure below shows a university internal network. All the line

Question

Q9. (4 marks) The figure below shows a university internal network. All the lines can support transmissions at 250 Mbps in both directions. The switches are full duplex. Also each switch can switch as many packets per second as the network can offer on its ports. i) What is the maximum aggregate throughput that this network can support? (2 marks) ii) If the line speeds of the connections between servers A and B and the switch were increased to 400 Mbps, would the aggregate throughput in your answer to i) increase? (2 marks) Justify your answers. Server A Server B

Explanation / Answer

i) The maximum aggregate throughput is the one that can be attained only is there is no bottleneck situation in the network.

Bottleneck: When many data packets travel through the same switch and that causes delay in the transmission of data packets through the network. Which reduces the throughput of the network.

So, the maximum aggregate throughput of this network will be 250 Mbps.

ii) Increasing line speed doesn't necessarily increase the throughput. It may increase the traffic in the network and increase the bottleneck.

So, the possibility of increase in the throughput is less.

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