200-301 Question 134
Select 3A network engineer is troubleshooting wireless connectivity issues in a corporate office. Some users report intermittent connectivity drops and slow speeds, especially in areas with multiple access points. The engineer suspects RF interference and overlapping channels. Which of the following actions should the engineer take to mitigate the issue?
- A
Perform a site survey to identify sources of RF interference and overlapping channels.
- B
Configure adjacent access points to use the same Wi-Fi channel to standardize the network.
- C
Enable Dynamic Channel Assignment (DCA) if supported by the wireless controller.
- D
Reduce the transmit power of access points to limit interference in overlapping coverage areas.
- E
Switch the wireless network to a 2.4 GHz band for better range and coverage.
Show answer and explanation
Correct answers: A, C, D
Explanation
To address RF interference and overlapping channels, the network engineer must first identify the sources of interference through a site survey. Enabling features like Dynamic Channel Assignment (DCA) can help optimize channel usage across access points. Additionally, reducing transmit power in areas with overlapping coverage can minimize interference without compromising connectivity. Configuring adjacent APs to the same channel or relying solely on the 2.4 GHz band would exacerbate interference issues.
- A. Correct.
Performing a site survey is critical to identify the sources of RF interference and overlapping channels. This step helps in planning and making necessary adjustments.
- B. Incorrect.
Configuring adjacent access points to use the same channel will likely increase interference and degrade network performance, making this an incorrect choice.
- C. Correct.
Dynamic Channel Assignment (DCA) allows the wireless controller to automatically assign optimal channels to access points, reducing channel overlap and interference.
- D. Correct.
Reducing the transmit power of access points can help minimize interference in areas where coverage overlaps, ensuring a more stable wireless experience.
- E. Incorrect.
Switching to the 2.4 GHz band may increase range, but it is more prone to interference and overcrowding due to limited non-overlapping channels, making it an ineffective solution for this scenario.