Enabling 5 GHz is a recommended mitigation for interference in crowded WLANs because 5 GHz has more channels and less congestion. Which option best describes this?

• A. It reduces interference by providing more non-overlapping channels and is supported by many modern devices
• B. It increases interference due to higher frequencies
• C. It reduces device compatibility
• D. It is not supported by most APs

Answer: (A)

The main idea is that the 5 GHz band offers a lot more spectrum with many non-overlapping channels, so devices can operate on different channels without stepping on each other. In crowded WLANs, interference worsens when APs and clients share the same or overlapping channels. The 2.4 GHz band has only a few non-overlapping channels, so traffic tends to collide and slow everyone down. By moving to 5 GHz, you gain far more channels that don’t overlap, which reduces contention and interference. It’s also widely supported by modern devices, so this mitigation works broadly. (Note: 5 GHz can have a shorter range, but the benefit here is reduced interference due to more non-overlapping channels.)