Question 31

802.11ax supports both 2.4GHz and 5GHz devices.

802.11ax, also known as Wi-Fi 6, is designed to operate on both the 2.4GHz and 5GHz frequency bands, providing improved performance and efficiency in wireless networking.

A) 802.11ac

802.11ac primarily operates on the 5GHz band and does not support 2.4GHz devices. While it offers higher speeds compared to earlier standards, its limitation to the 5GHz frequency means it cannot connect to 2.4GHz devices.

B) 802.11ax

802.11ax is the correct answer as it supports both 2.4GHz and 5GHz bands. This dual-band capability allows it to improve connectivity and performance across a wider range of devices.

C) 802.11b

802.11b operates solely on the 2.4GHz band and does not provide support for the 5GHz band. This limitation restricts its compatibility with newer devices that utilize the 5GHz frequency.

D) 802.11g

802.11g also operates only on the 2.4GHz band, similar to 802.11b. It does not support 5GHz, making it incompatible with devices that require this frequency for connectivity.

Conclusion

802.11ax is definitively the correct answer, as it is the only protocol listed that supports both frequency bands, enhancing compatibility and performance for various devices. In contrast, the other options are limited to either 2.4GHz or 5GHz, thus failing to meet the requirement of supporting both bands.