InJuniper Networks Mist AI Wireless, Radio Resource Management (RRM) is designed to optimize RF performance automatically while minimizing client impact. With the introduction ofWi-Fi 6E and the 6 GHz band, Juniper Mist follows industry standards and client behavior to ensure efficient and reliable operation. By default, Mist RRM uses thePreferred Scanning Channels (PSCs)in the 6 GHz spectrum.

The 6 GHz band introduces a very large number of available channels, which creates challenges for client discovery, scanning efficiency, and roaming speed. To address this, the IEEE definedPreferred Scanning Channels (PSCs)—a specific subset of 6 GHz channels that access points advertise and clients prioritize during active and passive scanning. These PSCs allow clients to discover networks faster without having to scan the entire 6 GHz channel set.

Juniper Mist RRM automatically selects and operates on these PSCs by default to:

Improve client discovery and association times

Reduce unnecessary scanning overhead

Enhance roaming performance

Maintain compatibility across a wide range of Wi-Fi 6E client devices

Mist continuously evaluates RF conditions using telemetry and AI-driven analysis, but it intentionally limits default operation to PSCs to balance performance, efficiency, and client interoperability. Administrators can override defaults and customize channel plans if required, but PSCs remain the recommended baseline for most deployments.

The incorrect options are explained as follows:

Option Bis incorrect because Mist RRM does not require manual primary channel selection by default.

Option Crefers to 2.4 GHz non-overlapping channels, not 6 GHz.

Option Drepresents the full 6 GHz channel range, which is not practical for default scanning or operation due to client limitations.

Therefore, the correct answer isthe preferred scanning channels (PSCs), which Juniper Mist RRM uses by default in the 6 GHz band to ensure optimal Wi-Fi 6E performance.