RCWA Exam Dumps : RUCKUS Certified Wi-Fi Associate Exam

Ahidden node problemoccurs when two or more client devices are within range of the AP butcannot hear each other, causing frame collisions that lead to degraded performance.

According toRUCKUS One Online Help – RF Interference and Hidden Node DetectionandRUCKUS AI Documentation – Airtime Efficiency Analysis, the symptoms include:

(A) Retransmissions:Frequent retries due to undetected collisions.

(D) Reduced throughput:Effective throughput decreases as airtime is wasted on retransmissions and ACK delays.

The issue is common in high-density or obstructed environments. EnablingRTS/CTSorBeamFlex+can mitigate it by improving communication coordination.

“Channel changes” occur in interference mitigation, not hidden-node detection; “Excessive roaming” and “Increased Tx power” are unrelated effects.

Innon-proxy RADIUS mode, theSmartZone controller does not act as an intermediaryfor authentication requests. Instead, eachaccess point (AP)communicatesdirectly with the RADIUS serverfor client authentication.

According toRUCKUS One Online Help – WLAN Authentication Modes (Proxy vs Non-Proxy), the key requirement is thateach AP must be defined as a RADIUS clientin the RADIUS server configuration. If not, authentication requests from the APs are rejected because the server does not recognize their source IPs or shared secrets.

This behavior differs fromproxy mode, where only the SmartZone controller needs to be added as a RADIUS client. Port numbers (1812/1813) and encryption types remain standard, and both802.1XandMAC authenticationare supported.

Therefore, authentication failure in this scenario occurs becauseeach AP must be authorized individuallyin the RADIUS server when non-proxy mode is used.

When two access points operate onoverlapping channelsin the same frequency band—such aschannel 7 and channel 8in the 2.4 GHz range—they createAdjacent Channel Interference (ACI). Unlikeco-channel interference (CCI), which occurs when APs share the exact same channel,ACIresults from partial channel overlap that causes energy spillover between adjacent frequencies.

According toRUCKUS One Online Help – Radio Configuration and Channel Planning, adjacent channels in 2.4 GHz are only 5 MHz apart, while each Wi-Fi channel occupies 20–22 MHz of bandwidth. As a result, channels like 7 and 8 significantly overlap, creating degraded performance, retransmissions, and reduced throughput.

RUCKUS’sChannelFlytechnology in bothRUCKUS AIandRUCKUS Analyticshelps automatically select non-overlapping channels (such as 1, 6, and 11) to minimize ACI and optimize network capacity.

Therefore, the correct answer isA – Adjacent interference, which directly applies to overlapping channel configurations.