N10-005 · Question #572
Which of the following standards can operate at both the 2.4GHz and 5GHz frequencies?
The correct answer is D. 802.11n. 802.11n was the first Wi-Fi standard designed to operate on both the 2.4GHz and 5GHz frequency bands, enabling greater flexibility and performance.
Question
Which of the following standards can operate at both the 2.4GHz and 5GHz frequencies?
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(36 responses)- B3% (1)
- C3% (1)
- D94% (34)
Why each option
802.11n was the first Wi-Fi standard designed to operate on both the 2.4GHz and 5GHz frequency bands, enabling greater flexibility and performance.
IEEE 802.11a operates exclusively at 5GHz with a maximum data rate of 54 Mbps and has no 2.4GHz capability.
IEEE 802.11b operates exclusively at 2.4GHz with a maximum data rate of 11 Mbps and has no 5GHz capability.
IEEE 802.11g operates exclusively at 2.4GHz with a maximum data rate of 54 Mbps and has no 5GHz capability.
IEEE 802.11n introduced dual-band operation, supporting both 2.4GHz and 5GHz, along with MIMO (Multiple Input Multiple Output) antenna technology to significantly increase throughput over previous standards. This made 802.11n backward compatible with older 2.4GHz devices while also supporting the less congested 5GHz band.
Concept tested: 802.11n dual-band frequency operation
Source: https://standards.ieee.org/ieee/802.11n/3725/
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