Certified Wireless Network Administrator (CWNA) Practice Test 2025 - Free Wireless Network Administrator Practice Questions and Study Guide

The correct answer identifies the frequency ranges utilized by IEEE 802.11 radios, specifically highlighting the bands that are most commonly associated with Wi-Fi technology.

The 2.400 - 2.4835 GHz range is one of the primary bands used by 802.11b, 802.11g, and 802.11n standards. This band is often referred to as the 2.4 GHz band and is widely used for wireless communications due to its ability to penetrate walls and obstacles effectively, although it can be crowded due to the presence of numerous devices such as microwaves and Bluetooth technologies.

Additionally, the frequency range of 5.15 - 5.25 GHz is also utilized, particularly by 802.11a and 802.11n standards. This 5 GHz band offers more available channels and generally experiences less interference than the 2.4 GHz band, making it a suitable choice for higher data rates and improved performance in wireless networks.

Other options listed cater to frequency ranges that are not typically recognized or allocated for standard 802.11 wireless communications. This is significant because understanding the correct frequencies is essential for wireless network planning, compliance with regulations, and ensuring optimal performance of wireless devices.