CWNA Wireless Network Administrator MCQ 2

Question 1

Which 802.11 amendment introduced OFDMA as a key technology to improve multi-user efficiency in dense environments?

Accepted Answer

802.11ax

Answer

802.11ac

Answer

802.11n

Answer

802.11ad

Question 2

A wireless engineer needs to reduce co-channel interference on a 2.4 GHz network. Which set of non-overlapping channels should be used?

Accepted Answer

1, 6, 11

Answer

1, 5, 9

Answer

2, 7, 12

Answer

1, 7, 13

Question 3

What is the primary function of the Distribution System (DS) in an 802.11 BSS architecture?

Accepted Answer

Connects multiple APs to form an ESS

Answer

Encrypts frames between client and AP

Answer

Provides DHCP services to wireless clients

Answer

Manages roaming between frequency bands

Question 4

Which EAP method uses a server-side certificate only and generates dynamic session keys via a TLS tunnel?

Accepted Answer

EAP-TTLS

Answer

EAP-TLS

Answer

LEAP

Answer

EAP-MD5

Question 5

A CWNA candidate measures a received signal of -65 dBm and a noise floor of -90 dBm. What is the SNR?

Accepted Answer

25 dB

Answer

155 dB

Answer

-25 dB

Answer

65 dB

Question 6

Which antenna type radiates power equally in all directions in the horizontal plane and is commonly used for general indoor coverage?

Accepted Answer

Dipole/omnidirectional

Answer

Yagi

Answer

Patch

Answer

Parabolic dish

Question 7

What does the term 'cell breathing' refer to in WLAN design?

Accepted Answer

The change in cell coverage area as client load increases or decreases

Answer

The AP periodically scanning for rogue devices

Answer

Automatic channel switching based on interference levels

Answer

The process of beacon frames expanding BSS coverage