CWNA WLAN Design & Site Survey 2

Question 1

What is 'throughput testing' in the context of a WLAN site survey?

Accepted Answer

Measuring actual data transfer rates at various locations throughout the facility

Answer

Throughput testing measures real data transfer rates at various locations to verify that the WLAN meets the bandwidth requirements of the intended applications.

Question 2

Which best describes the key difference between coverage-based and capacity-based WLAN design?

Accepted Answer

Coverage-based focuses on geographic area coverage; capacity-based focuses on number of concurrent users and bandwidth

Answer

Coverage-based design ensures RF signals reach all areas, while capacity-based design accounts for the density of concurrent users and their collective bandwidth demands.

Question 3

In a high-density WLAN deployment, what technique is most effective at reducing co-channel interference?

Accepted Answer

Reducing AP transmit power and deploying more APs with smaller cells

Answer

Reducing transmit power and deploying more APs creates smaller cells, allowing the same channels to be reused at shorter distances and reducing co-channel interference.

Question 4

Why is Signal-to-Noise Ratio (SNR) more meaningful than RSSI alone when evaluating WLAN performance?

Accepted Answer

SNR indicates the difference between the signal and the noise floor, directly affecting achievable data rates

Answer

SNR measures how much stronger the desired signal is compared to ambient noise; a high SNR enables higher modulation rates and throughput, regardless of the absolute RSSI value.

Question 5

Which set of elements should be included in a thorough site survey report?

Accepted Answer

AP placement, channel assignments, transmit power levels, coverage maps, and identified interference sources

Answer

A comprehensive site survey report must document AP placement, channel plan, transmit power settings, coverage heat maps, and all identified RF interference sources to provide a complete picture.

CWNA - Wireless Network Administrator Practice Test

CWNA - Wireless Network Administrator Practice Test

CWNA WLAN Design & Site Survey 2