CompTIA A+ Core 1 (220-1101) — Question 499

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

Answer options

• A. 802.11a
• B. 802.11ac
• C. 802.11b
• D. 802.11g

Correct answer: B

Explanation

The correct answer is B, 802.11ac, which operates on both 5GHz and 2.4GHz bands. Options A (802.11a) and C (802.11b) are limited to 5GHz and 2.4GHz respectively, while D (802.11g) operates only on 2.4GHz.