220-801 · Question #227
Which of the following wireless networking standards can operate at two different frequencies simultaneously?
The correct answer is D. 802.11n. 802.11n (Wi-Fi 4) was the first wireless standard to introduce dual-band capability, allowing operation on both the 2.4 GHz and 5 GHz frequency bands simultaneously. This provides backward compatibility with older 2.4 GHz devices while also supporting the faster, less congested…
Question
Which of the following wireless networking standards can operate at two different frequencies simultaneously?
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(36 responses)- A8% (3)
- B3% (1)
- C3% (1)
- D86% (31)
Explanation
802.11n (Wi-Fi 4) was the first wireless standard to introduce dual-band capability, allowing operation on both the 2.4 GHz and 5 GHz frequency bands simultaneously. This provides backward compatibility with older 2.4 GHz devices while also supporting the faster, less congested 5 GHz band. By contrast, 802.11a operates exclusively on 5 GHz, while 802.11b and 802.11g operate exclusively on 2.4 GHz - none of them support dual-band operation. 802.11n's dual-band support was a significant advancement in flexibility and throughput.
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