Review for First Test

The following questions are provided to help you study for the first test. Do not expect to see these exact questions on the test.

  1. What does the author's top-down approach mean, with regard to the ISO-OSI model?

  2. What is the difference between a logical model and a physical model?

  3. Discuss three measures of success that a customer might use to tell whether a new network or a network improvement are successful.

  4. Several of the terms and phrases the author defines under her discussion of project scope relate to the size of a network. What are some of the size designators she uses?

  5. Instead of asking a customer to rank their assets on a scale of importance, I suggested we should ask how long the customer could do without a resource. What would you do with the information that the customer gives?

  6. What are some of the business constraints the author tells us to watch out for in the first chapter?

  7. Compare centralized and decentralized computing models.

  8. What are two common events in business that cause an entity to need their network to be scalable?

  9. If a network is required to be available 99 percent of the time, how many minutes can we expect it to be down in an average week? What if it were required to be available 99.9 percent of the time?

  10. What is MTBF? What is the formula given in the text to calculate Availability using MTBF?

  11. How does the text compare a network's capacity to its utilization?

  12. What is a bit error rate? What is the expected BER for a digital WAN link using copper cable?

  13. Collisions can occur on a CSMA/CD network. When they do, what do we call a collision that takes place after the first 64 bytes of a frame? What if if happens after the preamble, but within the first 64 bytes of a frame?

  14. Why are large frames more efficient than smaller frames?

  15. What is propagation delay? What is the basic propagation delay for a given length of copper wire?

  16. If you create a series of maps of your client's network, what should be on the first map in a set that is drawn from a geographic perspective?

  17. On a map that shows equipment at different sites, what information should be shown on the lines that connect one site to another?

  18. If you have a map showing equipment in a large building, what is meant by vertical wiring? What does it usually connect? What about horizontal wiring?

  19. What is a valid network design concept when cables cannot be put in place due to an environmental or legal blockage?

  20. What are user communities, as that phrase is used in chapter 4?

  21. What networking model is being used when you see thin clients on a network? What kind of symmetry characterizes this kind of network usage?

  22. What is distributed computing? Why would a large entity use it for research projects?

  23. How does VoiceOverIP use two different kinds of network connections when it functions?

  24. How do broadcasts and multicasts affect network efficiency?

  25. How does windowing frames or packets add to the efficiency of a network?