CWS Site Survey Fundamentals Flashcards
7 cards from real CWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CWS Site Survey Fundamentals flashcards as text
During a site survey, which measurement is used to evaluate the RF channel's ability to support high data rates under real traffic conditions?
Answer: Retry rate and frame error rate under load
Retry rate and frame error rate under actual traffic load reveal real-world channel quality that static RSSI measurements cannot capture.
A CWS is asked to design a high-density venue (e.g., a stadium). Which AP placement strategy is MOST appropriate?
Answer: Use many low-power APs with directional antennas aimed at seating sections
High-density environments require many cell-splitting APs with reduced power and directional antennas to serve large numbers of clients in small, defined areas.
What is the purpose of a 'coverage overlap' requirement of 15–20% between adjacent APs in an enterprise Wi-Fi design?
Answer: To allow clients to roam without losing connectivity between cells
A 15–20% overlap zone ensures a client always has a strong signal from at least two APs, enabling seamless roaming handoffs without coverage gaps.
Which factor has the GREATEST impact on 5 GHz signal attenuation compared to 2.4 GHz in office environments?
Answer: Higher frequency signals experience greater material penetration loss through walls
Higher frequencies lose more energy when passing through building materials, meaning 5 GHz signals attenuate more rapidly than 2.4 GHz through walls and floors.
When documenting a site survey, which data should ALWAYS be included in the final deliverable?
Answer: Floor plans with AP placement, channel assignments, RSSI heatmaps, and identified interference sources
A complete site survey report includes annotated floor plans, AP locations, channel plans, RSSI/SNR heatmaps, and documentation of any interference sources found.
A surveyor is testing an outdoor point-to-point Wi-Fi link. Which concept describes the elliptical zone around the direct line of sight that must be kept 60% clear of obstructions?
Answer: Fresnel zone
The Fresnel zone is an elliptical region around the line-of-sight path; obstructions within the first Fresnel zone (especially the inner 60%) significantly degrade link performance.
What does 'channel reuse' mean in the context of a Wi-Fi site survey design?
Answer: Using the same frequency channel on geographically separated APs that won't interfere with each other
Channel reuse assigns the same channel to APs that are far enough apart that their signals don't overlap, maximizing spectrum efficiency across a large deployment.