Which 802.11 extension can operate in both 2.4 GHz and 5 GHz bands?

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Multiple Choice

Which 802.11 extension can operate in both 2.4 GHz and 5 GHz bands?

Dual-band operation is what this question tests. 802.11n introduced the ability to work on both the 2.4 GHz and the 5 GHz bands, often with MIMO to boost performance. That means devices and access points using this standard can connect on either band or even switch between them, depending on the hardware and network configuration. The other standards are tied to a single band: 802.11a uses 5 GHz only, 802.11g uses 2.4 GHz only, and 802.11ac is designed for 5 GHz with high data rates. So, 802.11n is the one that inherently supports operation across both frequency ranges.

Dual-band operation is what this question tests. 802.11n introduced the ability to work on both the 2.4 GHz and the 5 GHz bands, often with MIMO to boost performance. That means devices and access points using this standard can connect on either band or even switch between them, depending on the hardware and network configuration. The other standards are tied to a single band: 802.11a uses 5 GHz only, 802.11g uses 2.4 GHz only, and 802.11ac is designed for 5 GHz with high data rates. So, 802.11n is the one that inherently supports operation across both frequency ranges.

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