Information Technology Reference
In-Depth Information
Local-Area Networks and
LAN Switching
This chapter covers the CCIE Written blueprint objectives related to bridging, local-area
networks, and LAN switching. Other blueprint topics covered in this chapter include ATM
LANE and LAN security.
“Do I Know This Already?” Quiz
The purpose of this assessment quiz is to help you determine how to spend your limited
study time. If you can answer most or all of these questions, you might want to skim the
Foundation Topics section and return to it later as necessary. Review the Foundation
Summary section and answer the questions at the end of the chapter to ensure that you have
a strong grasp of the material covered. If you intend to read the entire chapter, you do not
necessarily need to answer these questions now. If you find these assessment questions
difficult, read through the entire “Foundation Topics” section and review it until you feel
comfortable with your ability to answer all of the Q&A questions at the end of the chapter.
The following questions are repeated at the end of the chapter in the Q & A section with
additional questions to test your mastery of the material.
Select the best answer. Answers to these questions are in the Appendix, “Answers to Quiz
Questions.”
What bit of each byte does an Ethernet NIC expect to read first off the wire?
1
a. The least significant bit first; this is the noncanonical format.
b. The most significant bit first; this is the noncanonical format.
c. The least significant bit first; this is the canonical format.
d. The most significant bit first; this is the canonical format.
Which access method listens to the wire before transmitting?
2
a. Token access
b. CSMA/CD
c. Token bus
d. 4B/5B
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