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Consider sending a file of 1 Mbits over a path of 5 links. Each link transmits...

Consider sending a file of 1 Mbits over a path of 5 links. Each link transmits at 10 Mbps. The network is lightly loaded so that there are no queuing delays. Propagation delay is negligible. When a form of packet switching is used, the file is broken up into 10 packets; each packet with 100 Kbits.

  1. Suppose the network is packet-switched virtual-circuit network. Denote the VC setup time by 10 milliseconds. Suppose the sending layer add a total of 100 bits of header to each packet. How long does it take to send the file from source to destination?
  1. Suppose the network is a packet-switched datagram network and a connectionless service is used. Now suppose each packet has 200 bits of header. How long does it take to send the file?
  1. Repeat (b), but assume message switching is used (that is, 200 bits are added to the message, and the message is not segmented).
  1. Finally, suppose that the network is a circuit-switched network. Further suppose that the transmission rate of the circuit between source and destination is 10 Mbps. Assuming 10 milliseconds set-up time and 100 bits of header appended to the entire file. How long does it take to send the file?
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