CWS Site Survey Fundamentals Flashcards

Which 802.11 amendment introduced the 6 GHz band (Wi-Fi 6E) and is particularly beneficial for reducing interference in dense survey environments?

Answer: 802.11ax (Wi-Fi 6/6E)

802.11ax (Wi-Fi 6E) extends operation into the 6 GHz band, which is currently free of legacy devices, providing a clean spectrum environment for new deployments.

During a site survey, a surveyor walks a data collection path and notices the software shows data points far apart on the floor plan. What is the MOST likely cause?

Answer: The surveyor is walking too fast for the software's data collection interval

Survey software collects data at set intervals; walking too quickly creates large gaps between data points, leaving areas unmeasured on the heatmap.

What is the primary reason a CWS should conduct a post-deployment validation survey after AP installation?

Answer: To verify the deployed network meets design specifications and coverage requirements

A post-deployment (validation) survey compares actual measured performance against the original design targets, identifying any gaps or underperforming areas.

A facility manager wants Wi-Fi coverage only in specific rooms, not in adjacent parking lots. Which AP antenna type BEST achieves this requirement?

Answer: Directional (patch or sector) antenna aimed inward

Directional antennas concentrate RF energy in a specific direction, reducing signal leakage to unintended areas like parking lots while improving coverage within target zones.

In a CWS site survey, what does 'adjacent channel interference' (ACI) refer to?

Answer: Interference caused by signals from partially overlapping channels

ACI occurs when channels partially overlap in frequency (e.g., channels 1 and 3 in 2.4 GHz), causing their signals to bleed into each other and degrade performance.

Which of the following BEST describes 'multipath' in RF propagation and its effect on Wi-Fi?

Answer: RF signals reflecting off surfaces and arriving at the receiver at different times, causing distortion

Multipath occurs when RF signals reflect off walls, floors, and objects, arriving at slightly different times and potentially causing destructive interference or 'dead spots.'

When a site survey report recommends a specific AP mounting height, what is the PRIMARY factor driving that recommendation?

Answer: Optimal height balances coverage radius, minimizing interference to adjacent cells while serving client devices at desk level

Mounting height affects the coverage footprint and the signal angle toward client devices; too high can cause excessive overlap and interference, while too low limits range.