Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 943

A customer has recently implemented a new wireless infrastructure using WLC-5520s at a site directly next to a large commercial airport. Users report that they intermittently lose Wi-Fi connectivity, and troubleshooting reveals it is due to frequent channel changes. Which two actions fix this issue? (Choose two.)

Answer options

• A. Enable DFS channels because they are immune to radar interference.
• B. Restore the DCA default settings because this automatically avoids channel interference.
• C. Remove UNII-2 and Extended UNII-2 channels from the 5 Ghz channel list.
• D. Disable DFS channels to prevent interference with Doppler radar.
• E. Configure channels on the UNII-2 and the Extended UNII-2 sub-bands of the 5 Ghz band only.

Correct answer: C, D

Explanation

The correct answers, C and D, address the issue of radar interference. Option C is valid because removing UNII-2 and Extended UNII-2 channels minimizes potential disruptions. Option D is also correct as disabling DFS channels prevents any interference with radar signals. Options A, B, and E would not resolve the channel change issue caused by radar interference.