With the aid of appropriate diagrams, give a brief description and the event timing of the following switching techniques: (i) Circuit switching; (ii) Packet switching. b) 17824 bits of data is to be transferred from a station A to station B. Assume a call setup time of 0.01 seconds for as witching network. Calculate the total data times needed when the following switching technologies are used: (i) Circuit switching; (ii) Virtual circuit and data-gram packet switching. The stations are separated by 3 hops (1 hop=4km), the signal propagation speed is 2000 km/s and the line capacity for each hop is 2400bps. Assume that each packet is 512 bits long with only 12 bits of overhead.

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