The exhibit from Cisco Prime Infrastructure displays information about non-802.11 interferers. The "Interferer Types" and "Top N Interferers" sections clearly show three distinct devices: a Bluetooth Link, a Bluetooth Discovery device, and a Video Camera. The "Interferer Severity" pie chart shows zero devices in the "Severe," "Significant," or "Moderate" categories. The detailed list confirms this, assigning each interferer a minimal severity of 1 and a low duty cycle of 1%. This evidence directly supports the conclusion that there are "several light interferers." While their impact is likely minimal, they are present and have been detected by CleanAir as potential sources of interference.

A: This is incorrect. The severity chart and the detailed list explicitly show that there are no strong (severe or significant) interferers; all have a minimal severity of 1.

C: This is incorrect. The provided output is a report on interferers and contains no information about AP locations, signal coverage, or physical "clusters," making any conclusion about AP placement impossible.

D: This is incorrect. The presence of only three minor interferers with a 1% duty cycle suggests a relatively clean RF environment, not one that is incapable of providing adequate performance.

1. Cisco

"Cisco CleanAir Technology White Paper": This document explains the core concepts of CleanAir. It defines the Severity Index (SI) as a value from 0 to 100

calculated from duty cycle and RSSI

which represents the potential impact of an interferer. A severity of 1

as shown in the exhibit

is the lowest possible non-zero value

classifying the interferers as minor or light. (See section "Interference Classification and Severity Index").

2. Cisco

"Radio Resource Management under Unified Wireless Networks

Cisco IOS XE Cupertino 17.9": This guide details how CleanAir functions within a Cisco wireless network. It states

"CleanAir is a spectrum analysis tool that can detect

classify

locate

and mitigate interference." The exhibit is a direct output of this detection and classification function

showing several light interferers have been identified. (See "CleanAir" section).

3. Cisco

"Cisco Prime Infrastructure 3.10 User Guide": The user guide for Prime Infrastructure explains how to interpret the dashboards. The "Interferers" dashboard

similar to the one in the exhibit

is used to "view a list of interferers that are active in your network." The data presented (type

severity

duty cycle) is for identifying these sources. The low values indicate the interferers are light. (See Chapter: "Monitoring Wireless Devices

" section "Monitoring Interferers").