CWNA: Certified Wireless Network Administrator v108 — Question 27

You are reconfiguring an AP to use the short guard interval for 802.11ac. How long will the new guard interval duration be after the change?

Answer options

• A. 800 ms
• B. 400 ns
• C. 400 ms
• D. 800 ns

Correct answer: B

Explanation

The short guard interval for 802.11ac is set at 400 ns, allowing for a more efficient use of the available bandwidth. Options A and C are incorrect as they reference milliseconds, which are too long for the guard interval. Option D, while closer, specifies 800 ns, which is not the standard duration for the short guard interval.