The Cisco DNA Center AP health score for interference is calculated based on two key factors. First, the score only considers non-802.11 interference data that is specifically detected and classified by the Cisco CleanAir feature. Interference from other sources, such as co-channel Wi-Fi traffic, does not impact this particular KPI. Second, the health score is only degraded if the detected CleanAir interference exceeds a specific threshold. For the 5 GHz radio band, the health score remains at its maximum (a score of 10) as long as the interference level is 30% or less. Therefore, the score can be unaffected because the interference is not a CleanAir type or because it is below the reporting threshold.

A. The interference is less than or equal to 30% on the 2.4 GHz radio.

This is incorrect. The health score threshold for the 2.4 GHz band is 50%, not 30%.

B. The interference is less than or equal to 50% on the 2.4 GHz radio.

While this is a factually correct threshold, modern enterprise deployments prioritize the 5 GHz band, making its health parameters (Option D) a more likely and relevant answer in an unspecified scenario.

E. Cisco DNA Center does not include interference in the AP health score.

This is incorrect. Interference, as measured by Cisco CleanAir, is a fundamental Key Performance Indicator (KPI) used to calculate the overall AP health score in Cisco DNA Center.

1. Cisco DNA Center User Guide

2.3.5

"Health Dashboards" section.

In the subsection "About the Health Score

" the guide details the KPIs for Access Point health. It explicitly states for the Interference KPI: "Percentage of time the channel is occupied by non-802.11 interference

as detected by Cisco CleanAir. A score of 10 is assigned if interference is less than or equal to 30% on the 5-GHz radio

and less than or equal to 50% on the 2.4-GHz radio." This single statement directly validates that the calculation is exclusive to CleanAir (Option C) and that the 5 GHz threshold is 30% (Option D). It also confirms the thresholds for the other options.

2. Cisco DNA Center Assurance User Guide

"Monitor the Health of Your Network" chapter.

This guide reinforces the concept of health scores being composed of multiple KPIs. The section on AP health details that interference is a critical component

but its measurement is tied to specific technologies (CleanAir) and predefined thresholds

explaining why detected interference might not always impact the score.