CWNA WLAN Design & Site Survey

Question 1

What type of site survey involves walking through a facility to assess RF coverage without associating to any access point?

Accepted Answer

Passive survey

Answer

A passive survey captures existing RF signals by listening only, without associating to an AP, making it ideal for assessing the existing RF environment.

Question 2

What is the primary purpose of a predictive site survey?

Accepted Answer

To model WLAN coverage using floor plan software before deployment

Answer

Predictive surveys use specialized software to model expected RF coverage from proposed AP placements on a floor plan before any hardware is installed.

Question 3

Which tool is best suited for identifying non-802.11 RF interference sources such as microwave ovens or DECT phones during a site survey?

Accepted Answer

Spectrum analyzer

Answer

A spectrum analyzer can detect and identify non-802.11 RF energy sources across a frequency range, which protocol analyzers cannot do since they only decode 802.11 frames.

Question 4

What is the recommended minimum RSSI for supporting Voice over Wi-Fi (VoWiFi) applications?

Accepted Answer

-67 dBm

Answer

Voice over Wi-Fi applications typically require a minimum RSSI of -67 dBm to maintain the consistent signal quality needed for real-time voice communications.

Question 5

In WLAN design, what does 'cell overlap' refer to?

Accepted Answer

The area where the coverage zones of two or more APs intersect

Answer

Cell overlap is the intentional area where signals from adjacent APs intersect, which is required so that roaming clients can detect the next AP before losing the current one.

CWNA - Wireless Network Administrator Practice Test

CWNA - Wireless Network Administrator Practice Test

CWNA WLAN Design & Site Survey