CWNA: Certified Wireless Network Administrator v107 — Question 19

You are installing an AP to be used by 23 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

Answer options

• A. Channel 6, because it is always best to use this channel
• B. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision
• C. Channel 1, because it is best to use the channel with the lowest frequency
• D. Channel 11, because channels 1 and 6 are in use nearby

Correct answer: D

Explanation

The correct choice is D because channels 1 and 6 are in use by a neighboring network and using channel 11 minimizes interference. Option A is incorrect as channel 6 is already in use nearby, and B is misleading since it incorrectly dismisses the impact of neighboring 2.4 GHz channels. Option C is wrong as it suggests using a lower frequency channel, which is not relevant for a 5 GHz AP.