CWNA V1.0 5

Question 1

A CWNA candidate must configure a 5 GHz channel that avoids interfering with weather radar systems. Which feature handles this automatically?

Accepted Answer

Dynamic Frequency Selection (DFS)

Answer

DFS requires APs to monitor for radar signals on certain 5 GHz channels and vacate the channel within 10 seconds if radar is detected.

Question 2

Which component of the 802.11i security standard is responsible for generating and managing the keys used to encrypt unicast data frames?

Accepted Answer

4-Way Handshake

Answer

The 4-Way Handshake derives and confirms the PTK (Pairwise Transient Key) used to encrypt unicast traffic between a client and AP.

Question 3

What is the Fresnel Zone and why does it matter for outdoor point-to-point wireless links?

Accepted Answer

An elliptical RF propagation region that must remain 60% clear of obstructions

Answer

The Fresnel Zone is an elliptical region around the line-of-sight path; obstruction of more than 40% causes significant signal loss through diffraction.

Question 4

A hospital wants to deploy a WLAN for medical devices that cannot tolerate packet loss. Which 802.11 feature allows an AP to signal clients about its neighbor APs to assist in roaming decisions?

Accepted Answer

802.11k Neighbor Report

Answer

802.11k allows APs to provide clients with a neighbor report listing nearby APs, enabling clients to make faster and more informed roaming decisions.

Question 5

In passive site survey methodology, what is the MAIN activity performed by the surveyor?

Accepted Answer

Listening and recording RF signals without transmitting

Answer

A passive survey uses a WLAN adapter in monitor mode to capture RF data without connecting to any network, ideal for assessing existing interference.

CWNA - Wireless Network Administrator Practice Test

CWNA - Wireless Network Administrator Practice Test

CWNA V1.0 5