Which Wi-Fi standard uses both 2.4 GHz and 5 GHz with a maximum speed of 600 Mbps?

Which Wi-Fi standard uses both 2.4 GHz and 5 GHz with a maximum speed of 600 Mbps?

• A. 802.11n (Wi-Fi 4)
• B. 802.11a
• C. 802.11g
• D. 802.11b

Answer: (A)

Dual-band capability and a high throughput figure point to 802.11n. This standard introduced MIMO (multiple input, multiple output) and the option to bond channels, letting devices operate on both 2.4 GHz and 5 GHz. With four spatial streams and a 40 MHz channel, the theoretical maximum reaches about 600 Mbps. In practice, speeds are lower, but this 600 Mbps ceiling comes from that combination of MIMO and wider channels. The other standards don’t fit because they are either single-band or offer much lower speeds: one operates only in the 5 GHz band with around 54 Mbps, while the others run on the 2.4 GHz band with 54 Mbps or 11 Mbps max.

Dual-band capability and a high throughput figure point to 802.11n. This standard introduced MIMO (multiple input, multiple output) and the option to bond channels, letting devices operate on both 2.4 GHz and 5 GHz. With four spatial streams and a 40 MHz channel, the theoretical maximum reaches about 600 Mbps. In practice, speeds are lower, but this 600 Mbps ceiling comes from that combination of MIMO and wider channels. The other standards don’t fit because they are either single-band or offer much lower speeds: one operates only in the 5 GHz band with around 54 Mbps, while the others run on the 2.4 GHz band with 54 Mbps or 11 Mbps max.