Free Practice Questions for RUCKUS RCWA Exam

Background Scanningin RUCKUS APs allows radios to periodically scan other channels to collect RF environment data while still serving clients. The scan interval determines how often the AP samples channel information for features likeChannelFly,Auto Cell Sizing, androgue detection.

According toRUCKUS One Online Help – Background Scanning and RF Management, andRUCKUS Analytics 3.5 User Guide – RF Monitoring, increasing theBackground Scanning intervalto90 secondsdelays updates for processes that depend on real-time RF sampling, specifically:

Rogue AP Detection (B):Takes longer to discover unauthorized or neighboring APs.

Auto-Channel Selection (C):Updates channel quality metrics less frequently, slowing responsiveness to interference changes.

Auto Power Adjustment (E):Depends on scanning results to optimize transmit power for coverage balance, so adjustments occur less frequently.

Processes such asclient countandthroughput measurementrely on active client data, not background scanning, andspectrum analysisoperates in a dedicated analysis mode outside of normal scanning intervals.

ForVoice-over-Wi-Fi (VoWiFi)deployments, RUCKUS recommends maintainingairtime utilization under 50%and ensuring aminimum RSSI of –65 dBmat the edge of coverage areas to guarantee clear call quality and low latency.

According toRUCKUS One Online Help – WLAN Design for Real-Time ApplicationsandRUCKUS AI Documentation – VoIP Quality Optimization, these thresholds ensure aSignal-to-Noise Ratio (SNR)above 25 dB, keeping jitter under 30 ms and packet loss below 1%.

RUCKUSSmartCast QoSautomatically prioritizes voice packets (802.11e WMM Voice AC) to further protect call performance, but maintaining low channel congestion remains critical.

RUCKUS Analytics 3.5 User Guide – Airtime and Voice Traffic Metricsemphasizes monitoring airtime utilization through dashboards to verify compliance with design thresholds.

Whenspectrum analysis modeis enabled on aRUCKUS Access Point, the AP’s radios are temporarily dedicated to spectrum scanning and interference analysis, meaning they cannot serve wireless clients during that period. Therefore,new clients will not be able to join, and existing clients are typically disconnected.

According to theRUCKUS One Online Help – Spectrum Analysis ToolandRUCKUS AI Documentation – RF Monitoring and Optimization, spectrum analysis mode captures and reportsRF energy utilization, identifying interference sources such as non-Wi-Fi devices, microwave ovens, or Bluetooth. The AP alternates its radio into “sniffer” mode to analyze RF characteristics, during whichclient association and data traffic handling are suspended.

The output is visualized throughgraphs and real-time utilization charts, not histograms. Furthermore, an AP can only scan one band (either 2.4 GHz or 5 GHz) at a time — not both simultaneously.

Thus, the correct answer isA, since enabling spectrum analysis prevents new client associations while the AP is in scanning mode.