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370 Chapter 10: X.25/Frame Relay Topologies

Q&A

As mentioned in Chapter 1, the questions and scenarios in this book are more difficult than what
you will experience on the actual exam. The questions do not attempt to cover more breadth or
depth than the exam; however, they are designed to make sure that you know the answer. Rather
than allowing you to derive the answer from clues hidden inside the question, the questions
challenge your understanding and recall of the subject. Questions from the "Do I Know This
Already?" quiz from the beginning of the chapter are repeated here to ensure that you have
mastered this chapter's topic areas. Hopefully, these questions will help limit the number of
exam questions on which you narrow your choices to two options and then guess. Be sure to
use the CD and take the simulated exams.

Unlike questions 115, which are directly out of the chapter, questions 1630 might or might
not be answered in this chapter. These questions are relevant to this chapter and can be
researched using the Internet or http://www.cisco.com. The answers to questions 115 can be
found in Appendix A.

X.25 uses what protocol at Layer 2?

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X.25 uses what protocol at Layer 3?

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At which layer do packet size and window size operate?

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For what does AO/DI stand?

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87200333.book Page 370 Wednesday, August 22, 2001 2:53 PM