MSc-IT Study Material
June 2010 Edition

Computer Science Department, University of Cape Town

Review Questions

  1. Write short answers to the following questions (e.g. using point form or short paragraphs).

    1. What are the advantages and disadvantages of packet switching?

    2. What are the advantages and disadvantages of circuit switching?

    Answer at the end of the chapter.

  2. Write short answers to the following questions (e.g. using point form or short paragraphs).

    1. What are the major differences between WANs and LANs?

    2. With the help of a diagram, explain how WANs, LANs and routers interact to form the Internet.

    Answer at the end of the chapter.

  3. Write short answers to the following questions (e.g. using point form or short paragraphs).

    1. Explain how livelock situations in routing can be resolved?

    2. What are the key disadvantages when allowing a router to re-assemble packets?

    3. How can the lifetime of a packet be used to assist re-assembly?

    Answer at the end of the chapter.

  4. Try to work out, using the information given in the text, the maximum number of Internet end-systems.

    Answer at the end of the chapter.

  5. With the aid of a diagram, explain the Domain Name System in short paragraphs or point form.

    Answer at the end of the chapter.

  6. Using point form or short paragraphs, name five key components of an IP packet.

    Answer at the end of the chapter.

  7. Explain why it was necessary to introduce an additional protocol, MIME, to handle mail communication.

    Answer at the end of the chapter.

  8. Does the Internet function via packet switching or circuit switching?

    Answer at the end of the chapter.