CWNA V1.0 3

Question 1

Which 802.11 security protocol uses SAE (Simultaneous Authentication of Equals) to replace the PSK handshake?

Accepted Answer

WPA3-Personal

Answer

WPA3-Personal replaced WPA2's 4-way PSK handshake with SAE, providing stronger protection against offline dictionary attacks.

Question 2

What is the maximum channel bandwidth introduced by 802.11ac (Wi-Fi 5) in the 5 GHz band?

Accepted Answer

160 MHz

Answer

802.11ac supports channel widths of up to 160 MHz (either contiguous or 80+80 MHz) in the 5 GHz band.

Question 3

Which WLAN architecture model places all intelligence and control functions on a centralized controller rather than in individual APs?

Accepted Answer

Centralized (controller-based) architecture

Answer

In centralized architecture, lightweight APs tunnel traffic to a WLAN controller that handles authentication, roaming, and policy enforcement.

Question 4

A site survey reveals a 'hidden node' problem. Which 802.11 mechanism is designed to mitigate this issue?

Accepted Answer

CSMA/CA with RTS/CTS

Answer

RTS/CTS (Request to Send/Clear to Send) frames alert all stations in range to defer transmission, reducing hidden node collisions.

Question 5

In the 2.4 GHz band, how many non-overlapping 20 MHz channels are available in the United States?

Accepted Answer

3

Answer

Only channels 1, 6, and 11 are non-overlapping in the US 2.4 GHz band, giving 3 usable channels without co-channel interference.

CWNA - Wireless Network Administrator Practice Test