CWNP
CWNA-108 · Question #186
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?
The correct answer is B. 400 ns. The HT PHY introduced two guard intervals: 400ns (called short) and 800ns (called long). Support of the 400ns SGI (Short Guard Interval) is optional for transmit and receive.
802.11 MAC and Physical Layers
Question
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?
Options
- A800 ms
- B400 ns
- C400 ms
- D800 ns
How the community answered
(25 responses)- A8% (2)
- B76% (19)
- C12% (3)
- D4% (1)
Explanation
The HT PHY introduced two guard intervals: 400ns (called short) and 800ns (called long). Support of the 400ns SGI (Short Guard Interval) is optional for transmit and receive.
Topics
#short guard interval#802.11ac#OFDM timing#GI duration
Community Discussion
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