A network administrator wants to change their wireless network frequency to reduce interference. Which frequency should be chosen?

Choosing the 5GHz frequency for a wireless network is a recommended approach to reduce interference. The 5GHz band offers several advantages over the 2.4GHz band, primarily because of its capability to accommodate more non-overlapping channels, thereby reducing the chance of interference from other nearby networks or devices that commonly operate on the crowded 2.4GHz spectrum.

Interference is a significant concern in wireless networking, particularly in environments with multiple devices and networks. The 5GHz band has a higher frequency, allowing it to support faster data rates and providing less interference due to fewer competing networks. Moreover, the increased number of available channels in this band means that network administrators can find a channel that is relatively unused, further alleviating interference issues.

In contrast, the 2.4GHz band is often congested, as it is widely used by many devices including microwaves, Bluetooth devices, and various older wireless networks, leading to a higher probability of interference. Other frequencies like 900MHz and 1.2GHz are typically not standard options for most consumer-grade wireless networking equipment and have limited applications in certain specialized devices. Overall, utilizing the 5GHz band is a practical and effective way to enhance wireless network performance by minimizing interference.