Ace the 2025 CWNA Challenge – Unleash Your Wireless Wizardry!

When deploying wireless networks that use Dynamic Frequency Selection (DFS) channels, radar detection must be enabled to comply with regulatory requirements. DFS channels are utilized to avoid interference with radar systems, which can be critical for technologies such as weather radar and military applications. As a result, access points (APs) operating on these channels are required to detect radar signals and vacate the channel if such signals are detected.

This ensures that the wireless network does not disrupt the operation of the radar, maintaining compliance with regulations set forth by the Federal Communications Commission (FCC) in the United States and similar regulatory bodies worldwide. The requirement for radar detection is crucial for the coexistence of wireless communications with sensitive radar equipment, which is why it is the correct choice.

In contrast, the other options do not align with the regulatory requirements regarding DFS. For example, while it is beneficial for clients to support DFS, it is not a regulatory mandate that all clients must, making that statement incorrect. The maximum power output of APs is limited by regulations and cannot be simply maximized, which makes that choice inaccurate as well. Lastly, the assertion that only 2.4 GHz channels can be used is not true, as DFS applies specifically to certain 5 GHz channels.