CWNA: Certified Wireless Network Administrator v108 — Question 7

You were previously onsite at XYZ's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.
When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?

Answer options

• A. Spectrum analysis to locate and identify RF interference sources.
• B. Frequency-band hopping analysis to detect improper RF channel implementations.
• C. Application analysis with an active phone call on an VoWiFi handset.
• D. Protocol analysis to discover channel use on neighboring APs.

Correct answer: C

Explanation

The correct answer is C because performing an application analysis with an active phone call on a VoWiFi handset allows you to evaluate the actual performance of the voice services over the WLAN. Options A, B, and D focus on other aspects of the RF environment but do not directly assess the quality and reliability of VoWiFi, which is critical for validating the deployment.