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This chapter is from the book


As mentioned in the introduction, you have two choices for review questions. The questions that follow give you a bigger challenge than the exam because they use an open-ended question format. By reviewing now with this more difficult question format, you can exercise your memory better and prove your conceptual and factual knowledge of this chapter. You can find the answers to these questions in Appendix A.

For more practice with exam-like question formats, including questions that use a router simulator and multiple choice format, use the exam engine on the CD.

  1. What is the benefit of following a method for troubleshooting?

  2. What are the main troubleshooting approaches?

  3. Which approach is best for complex cases?

  4. Which approach is usually adapted for user-initiated and simple cases?

  5. What are the drawbacks of the bottom-up approach?

  6. What are the drawbacks of the top-down approach?

  7. What are the guidelines for selecting the most effective troubleshooting approach?

  8. What does it mean to determine the scope of the problem?

  9. What does it mean to apply experience?

  10. What is the main benefit of analyzing the symptoms?

  11. At which layer of the OSI model does the bottom-up approach to troubleshooting begin?

  12. You have isolated a problem to be an encapsulation type mismatch between point-to-point serial interfaces (data link layer). Given this problem, which troubleshooting approach would be the least effective to select?

  13. A user has reported that a certain application does not run from his end system. You know that no filters are applied that would prevent the application from working. Running a traceroute command verifies that a connection exists between the end system of the user and the application server. Applying a layered approach to troubleshooting, which layer should you troubleshoot next?

  14. If you know that a user can access some resources but not others, which layer is the least likely culprit?

  15. When you learn that the users cannot browse the World Wide Web, you decide to first check the network layer and, based on your findings, decide what to troubleshoot next. Which approach have you adapted?

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