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- Question 50
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Question 50/51
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
Correct 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 . References: [CWNA-109 Study Guide], Chapter 4: Radio Frequency Signal and Antenna Concepts, page 163; [CWNA-108 Study Guide], Chapter 4:
Radio Frequency Signal and Antenna Concepts, page 157.
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 . References: [CWNA-109 Study Guide], Chapter 4: Radio Frequency Signal and Antenna Concepts, page 163; [CWNA-108 Study Guide], Chapter 4:
Radio Frequency Signal and Antenna Concepts, page 157.
- Question List (51q)
- Question 1: What authentication method is referenced in the 802.11-2016 ...
- Question 2: You have implemented an 802.11ax WLAN for a customer. All AP...
- Question 3: A client STA must choose the best AP for connectivity. As pa...
- Question 4: A WLAN is implemented using wireless controllers. The APs mu...
- Question 5: You are troubleshooting a problem with a new 802.11ax AP. Wh...
- Question 6: Option 43 must be configured to allow access points to locat...
- Question 7: An IEEE 802.11 amendment is in the daft state. What impact d...
- Question 8: You are evaluating access points for use in the 5 GHz freque...
- Question 9: What factor is likely to cause the least impact on the appli...
- Question 10: You are troubleshooting a client problem with a 2.4 GHz WLAN...
- Question 11: In addition to coverage analysis results, what should be inc...
- Question 12: ABC Company is planning to install a new 802.11ac WLAN, but ...
- Question 13: You are troubleshooting a client problem with a 2.4 GHz WLAN...
- Question 14: You are attempting to locate the cause of a performance prob...
- Question 15: What can cause excessive VSWR in RF cables used to connect a...
- Question 16: What feature of 802.1 lax (HE) is managed with beacon and tr...
- Question 17: Which one of the following channels can be used for VHT tran...
- Question 18: What cipher suite is specified by the 802.11-2016 standard a...
- Question 19: You manage a WLAN with 100 802.11ac access points. All acces...
- Question 20: When a STA has authenticated to an AP (AP-1), but still main...
- Question 21: An RF signal sometimes bends as it passes through a material...
- Question 22: Which one of the following is not a factor considered when c...
- Question 23: You are troubleshooting a controller-based AP that is unable...
- Question 24: You are using a tool that allows you to see signal strength ...
- Question 25: You are a small business wireless network consultant and pro...
- Question 26: You must plan for POE in an office environment. Which one of...
- Question 27: What statement about 802.11 WLAN bridges is true?...
- Question 28: Which directional antenna types are commonly used by indoor ...
- Question 29: What 802.11 PHY uses available space in very low frequency r...
- Question 30: You are troubleshooting a client issue on a Windows laptop. ...
- Question 31: The BSA of an AP covers the area used by the sales and marke...
- Question 32: A WLAN transmitter that emits a 50 mW signal is connected to...
- Question 33: What is required when operating 802.11ax APS in the 6 GHz ba...
- Question 34: You recently purchased four laptops containing dual-band 802...
- Question 35: A non-802.11 device is suspected of causing interference on ...
- Question 36: You are implementing a multi-AP WLAN and fast secure roaming...
- Question 37: You administer a WLAN that offers a guest SSID of GUESTNWORK...
- Question 38: You support a WLAN using dual-band 802.11ac three stream acc...
- Question 39: An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax...
- Question 40: You have been tasked with creating a wireless link between t...
- Question 41: In which plane of the three networking planes is an access p...
- Question 42: During a post-implementation survey, you have detected a non...
- Question 43: When an ACK frame is not received by the transmitting STA, w...
- Question 44: What is the final step in an effective troubleshooting proce...
- Question 45: You are performing a post-implementation validation survey. ...
- Question 46: Which one of the following 802.11 PHYs is more likely to be ...
- Question 47: To ease user complexity, your company has implemented a sing...
- Question 48: A string of characters and digits is entered into an AP and ...
- Question 49: You are the network administrator for ABC Company. Your mana...
- Question 50: You are reconfiguring an AP to use the short guard interval....
- Question 51: Which IEEE 802.11 physical layer (PHY) specification include...
