Chapter 12 BB

Question 1

Why is it important to understand all the various types of WLAN when implementing them into a specific LAN situation? Pg 381

Answer 1

Each type of WLAN has different strengths. For example, increasing the transmitting power allows greater transmitting distance, but can cause distortion; higher frequencies can achieve higher data rates but limits transmitting distance; etc.

Question 2

Which unlicensed bands are referred to as the Industrial, Scientific, and Medical (ISM) bands? Pg 381

Answer 2

900MHz and 2.4GHz

Question 3

Which unlicensed band is known as the Unlicensed National Information Infrastructure (UNII) band? Pg 381

Answer 3

5GHz

Question 4

T/F If you buy wireless access points from different manufacturers there is no cross compatibility nor any certification to help you create compatibility.

Answer 4

False. The Wi-Fi Alliance grants certification for interoperability among 802.11 products offered by various vendors.

Question 5

What is the 802 standard group for ethernet? What about for ethernet? Pg 383

Answer 5

Ethernet’s committee is 802.3, Wireless starts with 802.11.

Question 6

What is the maximum data rate of the 2.4GHz unlicensed radio band? Pg 384

Answer 6

11mbps

Question 7

What does RTS/CTS stand for and what does it do? Pg 385

Answer 7

Request To Send/Clear To Send. This is an optional implementation that comes with CSMA/CA, requires an extra acknowledgement for every packet sent.

Question 8

T/F If a WLAN is operating at 11mbps and then shifts to 5mbps, you will lose broadcast distance. Pg 385

Answer 8

False. The less data rate you have, the more broadcast distance you have.