Computer Science Homework Help

(A) Consider the following scenario: N = number of hops between two end systems L = length of the message in bits B = bandwidth in bits per second, on all links P = packet size in bits (for datagram and virtual circuit packet switching) The size is the same for all packets, and it includes the message portion plus any overhead H = overhead for each packet in bits (for datagram packet switching only; ignore the overhead for virtual circuit packet switching) S = call set up time in seconds (for circuit switching and virtual circuit packet switching) R = call release time in seconds (for circuit switching and virtual circuit packet switching) D = propagation delay per hop in seconds Ignore queuing and processing delays. If N = 8, L= 4096, B = 1024, P = 128, H = 32, S = 0.2, R = 0.1, D = 0.001, compute the end-to-end delay for the following three cases: • Message is sent using circuit switching • Message is sent using datagram packet switching • Message is sent using virtual circuit packet switchin