A message with length 1500 byte is transferred between the source and the destination through a switching network consists of 3 switches as shown below. The data rate on all link is 256kbs with packet size 1000 bit and 20 bits as a header. The set up time is 0.2s, with processing time at each switch is 0.02s, while the average queuing delay at each switch is 0.1s. The propagation speed over any link is 200 m/s with 100km distance between each two switches.

Determine the end-to-end delay time for

1) Virtual Circuit switching Datagram switching (pipelining)

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