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206 Chapter 4: Bridges/Switches and LAN Design
Q&A
As mentioned in Chapter 1, "All About the Cisco Certified Network Associate Certification,"
the questions and scenarios in this book are more difficult than what you should 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 itself, 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 the
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.
The answers to these questions can be found in Appendix A, on page 718.
1
What do the letters MAC stand for? What other terms have you heard to describe the same
or similar concept?
2
Name two benefits of LAN segmentation using transparent bridges.
3
What routing protocol does a transparent bridge use to learn about Layer 3 addressing
groupings?
4
What settings are examined by a bridge or switch to determine which should be elected as
root of the Spanning Tree?
5
Define the term VLAN.
6
Assume that a building has 100 devices attached to the same Ethernet. These users then
are migrated onto two separate shared Ethernet segments, each with 50 devices, with a
transparent bridge in between. List two benefits that would be derived for a typical user.
7
What standards body owns the process of ensuring unique MAC addresses worldwide?
8
Assume that a building has 100 devices attached to the same Ethernet. These devices are
migrated to two different shared Ethernet segments, each with 50 devices. The two
segments are connected to a Cisco LAN switch to allow communication between the two
sets of users. List two benefits that would be derived for a typical user.
9
Name two of the methods of internal switching on typical switches today. Which provides
less latency for an individual frame?
10
What is the distance limitation of 10BaseT? 100BaseTX?
11
Describe how a transparent bridge decides whether it should forward a frame, and tell how
it chooses the interface out which to forward the frame.
12
How fast is Fast Ethernet?
13
Describe the benefit of the Spanning-Tree Protocol as used by transparent bridges and
switches.
ch04.fm Page 206 Monday, March 20, 2000 5:02 PM