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?

A. Spectrum analysis to locate and identify RF interference sources.

B. Frequency-band hopping analysis to detect improper RF channel implementations.

C. Protocol analysis to discover channel use on neighboring APs.

D. Application analysis with an active phone call on an VoWiFi handset.