CWNA Wireless Network Administrator MCQ 3

Question 1

Which IEEE 802.11 frame type is used by clients to discover available networks when active scanning?

Accepted Answer

Probe request frame

Answer

During active scanning, a client broadcasts probe request frames on each channel to solicit responses from nearby APs.

Question 2

A network administrator wants to enforce 128-bit CCMP encryption. Which security standard requires this as its mandatory cipher?

Accepted Answer

WPA2

Answer

WPA2 (ratified as 802.11i) mandates CCMP with AES-128 as its required encryption cipher, replacing TKIP used in WPA.

Question 3

What is the maximum EIRP (in dBm) typically allowed for point-to-multipoint 5 GHz UNII-1 (5.15–5.25 GHz) transmissions under FCC rules?

Accepted Answer

23 dBm

Answer

FCC rules limit UNII-1 (5.15–5.25 GHz) indoor devices to a maximum of 50 mW (17 dBm) conducted power with up to 6 dBi antenna gain, yielding ~23 dBm EIRP.

Question 4

Which roaming mechanism defined in 802.11r allows key negotiation to occur before a client fully reassociates, reducing roaming latency?

Accepted Answer

Fast BSS Transition (FT)

Answer

802.11r Fast BSS Transition (FT) pre-negotiates cryptographic keys over the air or via the DS before reassociation, cutting roaming delay significantly.

Question 5

In a WPA3-Personal network, what replaces the traditional 4-way handshake pre-shared key exchange to resist offline dictionary attacks?

Accepted Answer

SAE (Simultaneous Authentication of Equals)

Answer

WPA3-Personal uses SAE, a password-authenticated key exchange based on the Dragonfly handshake, which provides forward secrecy and resists offline dictionary attacks.

CWNA - Wireless Network Administrator Practice Test

CWNA - Wireless Network Administrator Practice Test

CWNA Wireless Network Administrator MCQ 3