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| Certification Vendor: | CWNP |
|---|---|
| Exam Name: | CWNP Certified Wireless Network Administrator (CWNA) |
| Exam Number: | CWNA-109 |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Related Certifications: | Certified Wireless Network Administrator (CWNA) |
| Real Exam Qty: | 60 |
| Exam Format: | Multiple Select, Multiple Choice, Drag-and-Drop |
| Exam Price: | USD 250 |
| Passing Score: | 70% |
| Available Languages: | English |
| Sample Questions: | CWNP CWNA-109 Sample Questions |
| Exam Way: | Online (Proctored) or Authorized Testing Center |
| Pre Condition: | No formal prerequisites, but foundational networking knowledge recommended |
| Official Syllabus URL: | https://www.cwnp.com/certifications/cwna/ |
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問題 #179
During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-802.11 device?
答案：D
解題說明：
Airtime Utilization is a per-channel statistic that defines what percentage of the channel is currently being used, and what percentage is therefore free. Airtime usage can come from: Data traffic to and from client devices. Interference from WiFi and non-WiFi sources. Management overhead from APs and client devices.
問題 #180
An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain. What is the power level at the Intentional Radiator?
答案：B
問題 #181
Which semi-directional antenna type is commonly used for point-to-point bridge links and features multiple elements along a straight boom to focus RF energy in a narrow beamwidth?
答案：C
解題說明：
A Yagi antenna is a semi-directional antenna consisting of multiple elements, including a driven element, a reflector, and one or more directors, arranged along a boom. This design focuses RF energy into a narrower beamwidth compared to omnidirectional antennas, resulting in higher gain in a specific direction. Yagi antennas are commonly used for point-to-point outdoor bridge links and other applications requiring focused coverage over a moderate distance.
問題 #182
A natural disaster has occurred in a remote area that is approximately 57 miles from the response team headquarters. The response team must implement a local wireless network using 802.11 WLAN access points. What is the best method, of those listed, for implementation of a network back-haul for communications across the Internet in this scenario?
答案：D
解題說明：
Cellular/LTE/5G is the best method for implementing a network backhaul for communications across the Internet in a remote area that is affected by a natural disaster. This is because cellular/LTE/5G networks are wireless and do not depend on physical infrastructure that may be damaged or unavailable in such scenarios. Cellular/LTE/5G networks also offer high-speed data transmission and wide coverage area, which are essential for emergency response operations.
802.11 bridging to the response team headquarters is not feasible because it requires line-of- sight and has limited range. Turning up the output power of the WLAN at the response team headquarters is not effective because it may cause interference and does not guarantee reliable connectivity. Temporary wired DSL is not practical because it requires installing cables and equipment that may not be available or accessible in a remote area.
問題 #183
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
答案：B
解題說明：
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.
問題 #184
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