(a) Draw a message sequence chart that illustrates how TCP and UDP transmit three data segments. Assume that the size of each segment sent is 1500 bytes irrespective of the protocol used. All segments transmitted are successfully received. The TCP window size is 4500 bytes. As part of your illustration, you should show how TCP establishes a session between the source and the destination, and how TCP terminates the session. Indicate the TCP header flags used for each message in your message sequence charts. Comment on the extra workload which results from the use of TCP over UDP [10 marks tial distribution to model the packet inter-arrival times (b) Justify the choice of an of a queue. You may use the following result in your justification lim (1 +-) = e