CWNA 802.11 Standards & Protocol Architecture

Question 1

Which 802.11 amendment introduced OFDM (Orthogonal Frequency Division Multiplexing) to the 5 GHz band?

Accepted Answer

802.11a

Answer

802.11b

Answer

802.11g

Answer

802.11n

Question 2

What is the maximum number of non-overlapping channels in the 2.4 GHz band in the United States?

Accepted Answer

3

Answer

11

Answer

13

Answer

14

Question 3

Which 802.11 frame type is responsible for managing associations and authentications between clients and access points?

Accepted Answer

Management frames

Answer

Data frames

Answer

Control frames

Answer

Action frames

Question 4

What mechanism does 802.11 use to avoid collisions in the shared wireless medium?

Accepted Answer

CSMA/CA

Answer

CSMA/CD

Answer

Token ring

Answer

TDMA

Question 5

What is the purpose of the RTS/CTS mechanism in 802.11?

Accepted Answer

Mitigate the hidden node problem

Answer

Increase throughput by reducing ACK overhead

Answer

Set transmission power levels

Answer

Select the best channel automatically

Question 6

Which 802.11 amendment was the first to introduce channel bonding, combining two 20 MHz channels into a 40 MHz channel?

Accepted Answer

802.11n

Answer

802.11a

Answer

802.11g

Answer

802.11ac