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

Active survey

Answer

Predictive survey

Answer

Validation survey

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

To measure actual RF coverage after AP deployment

Answer

To test client roaming between APs

Answer

To measure co-channel interference in a live network

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

Wi-Fi protocol analyzer

Answer

Network management system

Answer

Packet sniffer

Question 4

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

Accepted Answer

-67 dBm

Answer

-50 dBm

Answer

-75 dBm

Answer

-85 dBm

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

The dead zone between two APs where neither signal is usable

Answer

The region beyond an AP's maximum coverage boundary

Answer

The interference zone directly around an AP antenna

Question 6

What percentage of cell overlap is generally recommended between adjacent APs to support seamless roaming for data applications?

Accepted Answer

15-20%

Answer

5-10%

Answer

35-45%

Answer

55-65%

Question 7

What is the purpose of measuring the 'noise floor' during a site survey?

Accepted Answer

To establish the baseline RF interference level present in the environment

Answer

To determine the maximum AP transmit power allowed by regulation

Answer

To measure the AP antenna gain at various angles

Answer

To calculate the maximum number of clients per AP