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| Section | Objectives |
|---|---|
| Topic 1: WLAN Infrastructure and Devices | - Access points and client devices
|
| Topic 2: WLAN Regulations and Standards | - Wireless standards and amendments
|
| Topic 3: RF Technologies and Fundamentals | - Radio frequency principles and behavior
|
| Topic 4: WLAN Network Design | - Design principles and planning
|
| Topic 5: WLAN Security and Management | - Security mechanisms and monitoring
|
| Topic 6: 802.11 Protocol and MAC Layer | - Frame types and communication process
|
만약ExamPassdump선택여부에 대하여 망설이게 된다면 여러분은 우선 우리ExamPassdump 사이트에서 제공하는CWNP CWNA-109관련자료의 일부분 문제와 답 등 샘플을 무료로 다운받아 체험해볼 수 있습니다. 체험 후 우리의ExamPassdump에 신뢰감을 느끼게 됩니다. 우리ExamPassdump는 여러분이 안전하게CWNP CWNA-109시험을 패스할 수 있는 최고의 선택입니다. ExamPassdump을 선택함으로써 여러분은 성공도 선택한것이라고 볼수 있습니다.
질문 # 77
Which EAP type requires digital certificates on both the authentication server and the client supplicant for mutual authentication?
정답：D
설명：
EAP-TLS (Extensible Authentication Protocol-Transport Layer Security) requires a digital certificate to be installed on both the RADIUS authentication server and the client device, or supplicant. This mutual certificate-based authentication makes EAP-TLS one of the most secure EAP types, as it does not rely on passwords that could be compromised. The tradeoff is the administrative overhead of deploying and managing a Public Key Infrastructure (PKI) to issue and maintain client certificates.
질문 # 78
What statement about 802.11 WLAN bridges is true?
정답：A
설명：
WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally. A WLAN bridge is a device that connects two or more networks using the 802.11 protocol. A WLAN bridge must have a clear and strong signal between the two endpoints to ensure reliable and fast data transmission. The signal-to-noise ratio (SNR) is a measure of the quality of the signal, which depends on the distance, interference, obstacles, and antenna gain between the transceivers. A higher SNR means a better signal quality and a higher data rate. A lower SNR means a worse signal quality and a lower data rate. Therefore, a WLAN bridge must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally1.
질문 # 79
An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802.11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?
정답：A
설명：
Based on the information given, what can be determined as certainly true about this AP is that it has 4 radio chains. A radio chain is a hardware component that consists of an antenna, a radio frequency (RF) amplifier, and a transceiver. The number of radio chains indicates how many spatial streams an AP can transmit or receive simultaneously using Multiple Input Multiple Output (MIMO) technology. The notation x:y:z in an AP specification denotes the number of radio chains (x), the number of spatial streams (y), and the number of spatial streams per band (z). Therefore, a tri-band, 4x4:4, Wi- Fi 6, 802.11ax AP has four radio chains in each of its three bands (2.4 GHz, low 5 GHz, and high 5 GHz). It also supports four spatial streams in total and four spatial streams per band. It cannot be determined as certainly true that it supports four channels in each band, UL-MU-MIMO, or uses a modified OpenWRT firmware based on the information given.
질문 # 80
In a long-distance RF link, what statement about Fade Margin is true?
정답：A
설명：
Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading. It is the difference between the receiver's sensitivity and the actual received signal level. A higher Fade Margin indicates a more robust link that can withstand interference, attenuation, or other factors that may reduce the signal strength. A lower Fade Margin means that the link is more susceptible to failure or performance degradation. Fade Margin is usually expressed in decibels (dB) and can be calculated by subtracting the receiver sensitivity from the received signal level. References: 1, Chapter 2, page
51; 2, Section 2.1
질문 # 81
What is a common source of RF interference in the 2.4 GHz ISM band that does not originate from an 802.11 device?
정답：A
설명：
Microwave ovens are a well-known source of non-802.11 RF interference in the 2.4 GHz ISM band, as they operate by emitting energy at frequencies that overlap with the Wi-Fi spectrum, particularly around channel 9-11. Other common non-802.11 interference sources in this band include cordless phones, Bluetooth devices, wireless video cameras, and certain types of industrial, scientific, and medical equipment. These devices do not follow 802.11 protocols and can cause unpredictable interference that a spectrum analyzer is needed to identify, since standard Wi-Fi survey tools cannot detect non-802.11 energy.
질문 # 82
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ExamPassdump CWNA-109 최신 PDF 버전 시험 문제집을 무료로 Google Drive에서 다운로드하세요: https://drive.google.com/open?id=1_TCQVWhhEWg1UnQFLcJ_I9IuBQgFIM55