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

Testing physical cable connections between APs and switches

Answer

Analyzing the total number of APs visible from each location

Answer

Measuring signal strength with a handheld RSSI meter

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 uses fewer, more powerful APs; capacity-based uses cheaper, lower-power APs

Answer

Coverage-based is for indoor deployments; capacity-based is for outdoor deployments

Answer

Coverage-based uses omnidirectional antennas; capacity-based uses only directional antennas

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

Increasing AP transmit power to maximum

Answer

Using only the 2.4 GHz band for all clients

Answer

Increasing antenna gain on each AP

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 determines the number of APs required per floor

Answer

SNR measures the AP's maximum output power in dBm

Answer

SNR defines the channel width that the AP will use

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

AP placement locations only

Answer

Coverage maps and interference sources only

Answer

AP serial numbers and firmware versions only

Question 6

What is 'adjacent channel interference' in the 2.4 GHz band?

Accepted Answer

Interference between APs using channels that share overlapping frequency spectrum

Answer

Interference between APs using channels that are far apart in frequency

Answer

Interference originating from non-Wi-Fi devices such as Bluetooth

Answer

Interference caused by multipath signal reflections indoors

Question 7

What factor primarily drives the number of APs required in a capacity-based WLAN design?

Accepted Answer

The number of concurrent users and their aggregate bandwidth requirements

Answer

The total physical square footage of the building

Answer

The type and gain of antennas selected for the deployment

Answer

The maximum EIRP permitted by FCC regulations