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132 Chapter 4: ATM Solutions

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 this 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.

The answers to these questions can be found in Appendix A.

What is the size of an ATM cell, and how do its fixed length and size contribute to low
latency?

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What are the two types of virtual circuits used by ATM?

______________________________________________________________________

Name and describe the three layers of the ATM reference model.

______________________________________________________________________

What layer of the OSI model closely relates to the ATM reference model?

______________________________________________________________________

87200333.book Page 132 Wednesday, August 22, 2001 2:18 PM