CompTIA Network+ Training Kit: Wireless Networking

Answers

This section contains the answers to the questions for the Exercise and Chapter Review in this chapter.

Exercise

1. IEEE 802.11n

2. IEEE 802.11b

3. IEEE 802.11a, IEEE 802.11g, IEEE 802.11n

4. IEEE 802.11a and IEEE 802.11g

5. IEEE 802.11b and IEEE 802.11g

Chapter Review

1. Correct Answers: A and D

   1. Correct: The IEEE 802.11a standard calls for the use of the 5-GHz band exclusively.

   2. Incorrect: The IEEE 802.11b standard calls for the use of the 2.4-GHz band exclusively.

   3. Incorrect: The IEEE 802.11g standard calls for the use of the 2.4-GHz band exclusively.

   4. Correct: The IEEE 802.11n standard calls for the use of either the 2.4-GHz or the 5-GHz band.

2. Correct Answer: D

   1. Incorrect: The IEEE 802.11a and 802.11g standards define a maximum transfer rate of 54 Mbps.

   2. Incorrect: An IEEE 802.11n network with one spatial stream can transmit at up to 150 Mbps.

   3. Incorrect: An IEEE 802.11n network with two spatial streams can transmit at up to 300 Mbps.

   4. Correct: An IEEE 802.11n network with four spatial streams can transmit at up to 600 Mbps.

3. Correct Answer: B

   1. Incorrect: The administrator does not configure the basic service set identifier.

   2. Correct: The basic service set identifier is the 6-byte MAC address assigned to the access point by the manufacturer.

   3. Incorrect: The basic service set identifier is a data-link layer element. It has nothing to do with IP addressing.

   4. Incorrect: Because it is a MAC address, the basic service set identifier is assigned in part by the IEEE, but the other part is assigned by the device manufacturer, not by the administrator.

4. Correct Answer: C

   1. Incorrect: Channels 1, 6, and 11 do not operate at 5 GHz.

   2. Incorrect: Channels 1, 6, and 11 do not have longer ranges than the other channels.

   3. Correct: Channels 1, 6, and 11 use frequencies that do not overlap. Therefore, there is no interference between the networks.

   4. Incorrect: There are no legal restrictions to using any combination of channels 1 through 11 in the United States.