CompTIA Network+ Practice Test

What is the primary function of Dynamic Frequency Selection (DFS) in Wi-Fi networks?

1. Avoids frequency conflicts

2. Enhances signal strength for all clients

3. Increases the overall bandwidth capacity

4. Reduces the number of access points needed

The correct answer is: Avoids frequency conflicts

Dynamic Frequency Selection (DFS) is primarily designed to help Wi-Fi networks avoid frequency conflicts by monitoring and adapting to the radio environment. This functionality is especially important in environments where both Wi-Fi and radar systems (such as weather radar and military radar) operate within the same frequency bands. When DFS is implemented, the Wi-Fi access point can detect radar signals on certain channels and will automatically switch to a different channel to avoid interference. This process not only ensures compliance with regulatory requirements but also helps maintain a stable connection for users by minimizing disruptions caused by overlapping frequencies. While the other options touch on aspects of network management and performance, they do not directly relate to the core purpose of DFS. For instance, enhancing signal strength, increasing bandwidth capacity, or reducing the number of access points are benefits that can be achieved through different methodologies and technologies, rather than being the fundamental role of DFS. Thus, the primary function of DFS is crucial for maintaining optimal performance and connectivity in the face of potential interference.