Which two operational modes enable an AP to scan one or more wireless channels for rogue access points and at the same time provide wireless services…

Local and FlexConnect are the two primary access point (AP) operational modes that serve wireless clients. Both modes incorporate off-channel scanning, a process where the AP briefly tunes its radio to a different channel to monitor the RF environment. This allows the AP to detect rogue access points, measure interference, and gather Radio Resource Management (RRM) data while simultaneously providing uninterrupted wireless service to clients on its primary channel. The AP quickly returns to its assigned channel after each brief scan.

B. rogue detector: This is a dedicated mode that only listens for rogue devices on all channels and does not provide any client services.

C. monitor: This mode dedicates the AP to act as a sensor for tasks like Intrusion Detection Systems (IDS) and RF analysis (CleanAir), but it does not serve clients.

E. sniffer: In this mode, the AP is dedicated to capturing 802.11 frames on a specific channel for troubleshooting and analysis, and it does not serve clients.

1. Cisco Wireless LAN Controller Configuration Guide

Release 8.5

"About Access Point Modes" section.

Local Mode: "In this mode

the access point offers one or more BSSs on a specific channel. The access point scans other channels periodically to measure the level of noise and interference

discover rogue access points

and check for IDS events."

FlexConnect Mode: "A FlexConnect access point can also perform rogue access point scanning and report the results to the controller." This is done while the AP is in its primary client-serving role.

Monitor

Rogue Detector

and Sniffer Modes: The guide explicitly states for each of these modes that the AP "does not serve clients" or "does not associate clients" while in that mode.

2. Cisco

"Radio Resource Management: Concepts" White Paper

"Off-Channel Scanning" section.

This document explains that client-serving APs (like those in Local or FlexConnect mode) go "off-channel" for a short duration (default 50 ms) to scan other channels. This process is designed to be minimally disruptive to client traffic while enabling functions like rogue detection.