CWNA: Certified Wireless Network Administrator v108 — Question 11

Which IEEE 802.11 physical layer (PHY) specification includes support for operation in the 2.4 GHz, 5 GHz, and 6 GHz bands?

Answer options

• A. HT (802.11n)
• B. HR/DSSS (802.11b)
• C. VHT (802.11ac)
• D. HE (802.11ax)

Correct answer: A

Explanation

The correct answer is A, HT (802.11n), as it is designed to operate in the 2.4 GHz and 5 GHz bands. Options B, C, and D specify older or more advanced standards that do not encompass all three frequency bands mentioned, particularly the 6 GHz band, which is supported by HE (802.11ax) but not by HT (802.11n).