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| Certification Vendor: | CWNP |
|---|---|
| Exam Name: | CWNA-109 Certified Wireless Network Administrator Exam |
| Exam Number: | CWNA-109 |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Real Exam Qty: | 60-90 |
| Related Certifications: | CWSP CWNE CWAP CWDP |
| Exam Format: | Multiple Response, Multiple Choice |
| Exam Price: | USD 300 (approx.) |
| Certificate Validity Period: | 3 years |
| Passing Score: | 70% |
| Recommended Training: | CWNA Study Guide Resources CWNP Official CWNA Training |
| Exam Registration: | CWNP CWNA Certification Page Pearson VUE Registration |
| Sample Questions: | CWNP CWNA-109 Sample Questions |
| Exam Way: | Computer-based exam delivered via Pearson VUE testing centers or online proctored exam |
| Pre Condition: | No formal prerequisite required; basic networking knowledge recommended |
| Official Syllabus URL: | https://www.cwnp.com/certifications/cwna/ |
CWNA-109 認證題庫讓你順利高分甚至滿分通過 CWNA-109 考試，短時間取得應該取得 CWNP 證照。KaoGuTi 题库网承诺，只要使用本网站的题库去参加 CWNA-109 认证考试，我们确保你能一次通过 CWNP 的 CWNA-109 考试，否则退还购买题库的所有费用。同时，网站会根据考试认证厂商的动态变化而及时更新，确保 CWNA-109 题库始终是最新最全的。
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問題 #13
What term is used to describe multiple RF signal copies arriving at a receiver at slightly different times due to reflection, refraction, scattering, and diffraction?
答案：B
解題說明：
Multipath occurs when an RF signal takes multiple paths to reach the receiving antenna due to reflection, refraction, diffraction, and scattering. Because each path has a different length, the signal copies arrive at slightly different times with different phases and amplitudes. Multipath can cause data corruption in legacy systems, but modern 802.11n/ac/ax devices use MIMO technology, including techniques like Maximal Ratio Combining and spatial multiplexing, to take advantage of multipath rather than being negatively affected by it.
問題 #14
The requirements for a WLAN you are installing state that it must support unidirectional delays of less than
150 ms and the signal strength at all receivers can be no lower than -67 dBm. What application is likely used that demands these requirements?
答案：A
解題說明：
VoIP (Voice over Internet Protocol) is an application that is likely used that demands the requirements of unidirectional delays of less than 150 ms and the signal strength at all receivers can be no lower than -67 dBm. VoIP is an application that allows users to make and receive voice calls over a network, such as the Internet or a WLAN. VoIP is a real-time and interactive application that requires high quality of service (QoS) to ensure good user experience and satisfaction. One of the QoS metrics for VoIP is delay, which is the time it takes for a voice packet to travel from the sender to the receiver. Delay can affect the quality and intelligibility of the voice conversation, as well as the synchronization and naturalness of the dialogue. The ITU-T G.114 recommendation suggests that the maximum acceptable one-way delay for VoIP should be less than 150 ms, as anything higher than that can cause noticeable degradation and annoyance to the users.
Another QoS metric for VoIP is signal strength, which is the measure of how strong the RF signal is at the receiver. Signal strength can affect the reliability and performance of the wireless connection, as well as the data rate and throughput of the VoIP traffic. The CWNA Official Study Guide recommends that the minimum signal strength for VoIP should be -67 dBm, as anything lower than that can cause packet loss, retries, jitter, and other issues that can impair the voice quality. References: 1, Chapter 10, page 398; 2, Section 6.1
問題 #15
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 #16
What common feature of MDM solutions can be used to protect enterprise data on mobile devices?
答案：B
解題說明：
A common feature of MDM solutions that can be used to protect enterprise data on mobile devices is containerization. Containerization is a technique that creates a separate and secure environment on the mobile device where enterprise data and applications are stored and accessed. Containerization isolates the enterprise data from the personal data and prevents unauthorized access, leakage, or loss of sensitive information. Containerization can also enforce security policies, encryption, authentication, and remote wipe on the enterprise data and applications. Over-the-air registration, onboarding, and self-registration are features of MDM solutions that facilitate the enrollment and management of mobile devices, but they do not directly protect enterprise data on mobile devices.
問題 #17
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?
答案：A
解題說明：
The center frequency of channel 4 in the 2.4 GHz band is 2.427 GHz (2427 MHz). The center frequency of a channel is the midpoint of its frequency range, where the signal strength is highest and most concentrated.
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz), as given in the question.
The center frequency of each subsequent channel is obtained by adding 5 MHz to the previous channel's center frequency, since the channels are spaced 5 MHz apart from each other in this band. Therefore, to find the center frequency of channel 4, we need to add 15 MHz (5 MHz x 3) to the center frequency of channel 1:
2.412 GHz + 0.015 GHz = 2.427 GHz
Alternatively, we can use a formula to calculate the center frequency of any channel in the 2.4 GHz band:
Center frequency (GHz) = 2.407 + (0.005 x Channel number)
Using this formula for channel 4, we get:
Center frequency (GHz) = 2.407 + (0.005 x 4)
Center frequency (GHz) = 2.407 + 0.02
Center frequency (GHz) = 2.427 References: 1, Chapter 3, page 85; 2, Section 3.2
問題 #18
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CWNA-109 PDF: https://www.kaoguti.com/CWNA-109_exam-pdf.html
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