Networks and Delay

  1. Kurose & Ross, Chapter 1, Problem P6
  2. Kurose & Ross, Chapter 1, Problem P23
  3. Kurose & Ross, Chapter 1, Problem P25
  4. Kurose & Ross, Chapter 1, Problem P26
  5. Kurose & Ross, Chapter 1, Problem P27
  6. Kurose & Ross, Chapter 1, Problem P31

  7. Use the following network and the convention that 1 kB = 103 bytes and 1 MB = 106 bytes.

    network

    1. Node A transmits a stream of 1 kB packets to node C. Assuming no other traffic in the network, explain why there will never be any queueing delay at node B.

    2. Draw a diagram that represents the stream of packets over time, using the example covered in class.

    3. How long would it take to transfer a 1 MB file, divided into 1 kB packets, from A to C? Which type of delay dominates?

    4. If both links are upgraded to a rate of 1 Gbps, how long would it take to transfer a 1 MB file from A to C? Which type of delay dominates now?

  8. Use the following network and the convention that 1 kB = 103 bytes and 1 MB = 106 bytes.

    network

    1. Node A transmits 1000 packets, each of size 1 kB, to node C. Explain why there will be queueing delay at node B.

    2. Draw a diagram that represents the stream of packets over time, using the example covered in class.

    3. Derive a formula for the queueing delay for packet k What is the largest number of packets the queue will ever hold?

    4. How long would it take to transfer a 1 MB file, divided into 1 kB packets, from A to C? Does the queueing delay affect transfer time?