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Question 56 - CWNA-109 discussion

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

A.
800 ns
Answers
A.
800 ns
B.
400 ns
Answers
B.
400 ns
C.
104 ms
Answers
C.
104 ms
D.
10 ms
Answers
D.
10 ms
Suggested answer: B

Explanation:

The short guard interval is an optional feature of 802.11n and 802.11ac that reduces the time between OFDM symbols from 800 ns to 400 ns. This can increase the data rate by about 11%, but also requires more precise timing and synchronization between the transmitter and the receiver. The short guard interval is only used when both the AP and the client support it and agree to use it .Reference:[CWNA-109 Study Guide], Chapter 4: Radio Frequency Signal and Antenna Concepts, page 163; [CWNA-109 Study Guide], Chapter 4: Radio Frequency Signal and Antenna Concepts, page 157.

asked 16/09/2024
Jordan Pfingsten
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