300-430 Question 262
Select 3A wireless network administrator notices degraded performance in a critical office area. While using Cisco Prime Infrastructure, the administrator identifies a high number of RF interferers in the 2.4 GHz band. What steps can the administrator take to manage these RF interferers and improve performance in the affected area?
- A
Identify and physically remove non-Wi-Fi devices causing interference.
- B
Manually configure access points to use a different non-overlapping 2.4 GHz channel.
- C
Enable Dynamic Channel Assignment (DCA) in the Wireless LAN Controller (WLC) to automatically adjust channels.
- D
Switch all access points in the affected area to operate exclusively on the 5 GHz band.
- E
Increase the transmit power of access points in the 2.4 GHz band to overpower the interferers.
Show answer and explanation
Correct answers: A, B, C
Explanation
To manage RF interferers in the 2.4 GHz band, administrators should first identify and remove any non-Wi-Fi devices causing interference. Manually assigning non-overlapping channels or enabling DCA in the WLC can further help optimize channel usage and mitigate interference. Switching entirely to the 5 GHz band or increasing transmit power are not ideal solutions, as they either limit functionality or exacerbate interference issues.
- A. Correct.
Identifying and removing non-Wi-Fi interfering devices (e.g., cordless phones or microwave ovens) is a best practice for managing RF interference.
- B. Correct.
Manually configuring access points to use non-overlapping channels (e.g., 1, 6, 11 in the 2.4 GHz band) can help avoid interference and improve performance.
- C. Correct.
Enabling Dynamic Channel Assignment (DCA) allows the WLC to automatically manage channel assignments and mitigate interference dynamically.
- D. Incorrect.
Switching to the 5 GHz band can reduce interference but may not be feasible if client devices or applications rely on the 2.4 GHz band.
- E. Incorrect.
Increasing the transmit power of access points can worsen interference and cause co-channel interference, reducing overall network performance.