300-425 Question 260
Select 3An enterprise wireless network in a manufacturing facility is experiencing degraded performance. Upon investigation using Cisco DNA Center, you discover a high level of RF interference in the 2.4 GHz band. The interference is identified as coming from legacy equipment used for industrial automation. What actions can you take to mitigate this RF interference while maintaining network performance?
- A
Change the channel for the affected 2.4 GHz access points to avoid the interference.
- B
Enable Dynamic Channel Assignment (DCA) in Cisco Wireless LAN Controller to automatically adjust channels based on interference.
- C
Deploy additional 2.4 GHz access points to overpower the interference with stronger signals.
- D
Migrate affected devices to the 5 GHz band to avoid interference in the 2.4 GHz spectrum.
- E
Implement a spectrum analyzer to monitor and identify the specific characteristics of the interfering signal.
Show answer and explanation
Correct answers: A, B, D
Explanation
Managing RF interference requires a combination of strategies. Changing channels and enabling Dynamic Channel Assignment (DCA) directly address the interference by optimizing the use of the wireless spectrum. Migrating devices to the 5 GHz band avoids the congested 2.4 GHz band entirely, providing a more stable and interference-free environment. Deploying additional access points in the same 2.4 GHz band could exacerbate interference, and spectrum analyzers are diagnostic tools rather than mitigative solutions.
- A. Correct.
Changing the channel of the affected access points can help avoid the interference caused by the legacy equipment if the interference is localized to specific channels.
- B. Correct.
Enabling Dynamic Channel Assignment (DCA) allows the wireless network to automatically adjust channels in response to interference, minimizing its impact.
- C. Incorrect.
Deploying additional 2.4 GHz access points does not mitigate interference and may worsen the situation by increasing co-channel and adjacent-channel interference.
- D. Correct.
Migrating devices to the 5 GHz band helps avoid interference in the 2.4 GHz band, as the 5 GHz spectrum is less congested and typically has better performance in such scenarios.
- E. Incorrect.
While implementing a spectrum analyzer can help identify interference sources, it does not directly mitigate the interference.