Which of the following 802.11 standards supports both 5GHz and 2.4GHz channel frequencies?

The correct answer is B. 802.11ac. Option B (802.11ac) is the exam's correct answer. In practice, 802.11ac devices are universally deployed as dual-band, supporting 2.4GHz (via 802.11n backward compatibility) and 5GHz. For CompTIA exam purposes, 802.11ac is the standard associated with dual-band operation among th

Networking

Question

Options

A802.11a
B802.11ac
C802.11b
D802.11g

How the community answered

(67 responses)

A
6% (4)
B
88% (59)
C
4% (3)
D
1% (1)

Explanation

Option B (802.11ac) is the exam's correct answer. In practice, 802.11ac devices are universally deployed as dual-band, supporting 2.4GHz (via 802.11n backward compatibility) and 5GHz. For CompTIA exam purposes, 802.11ac is the standard associated with dual-band operation among the listed choices. Option A (802.11a) operates only on 5GHz. Option C (802.11b) and Option D (802.11g) operate only on 2.4GHz. Note: 802.11n is technically the first standard defined to operate on both bands, but it is not among the choices, making 802.11ac the best answer in this context.

Topics

#802.11 standards#Wi-Fi frequencies#Wireless networking#Networking protocols

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