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より良い生活を送るには、自分の能力を向上する必要があります。CWNA-109試験に参加することはひとつの方法です。CWNA-109学習教材を買うと、その教材の高品質に驚いています。CWNA-109学習教材の的中率が高いですので、多くの人はCWNA-109試験に合格しました。従って、より良い生活のために、早くCWNA-109学習教材を入手します。
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CWNPのCWNA-109認定試験を受験する気があるのですか。この試験を受けた身の回りの人がきっと多くいるでしょう。これは非常に大切な試験で、試験に合格してCWNA-109認証資格を取ると、あなたは多くのメリットを得られますから。では、他の人を頼んで試験に合格する対策を教えてもらったのですか。試験に準備する方法が色々ありますが、最も高効率なのは、きっと良いツールを利用することですね。ところで、あなたにとってどんなツールが良いと言えるのですか。もちろんCertJukenのCWNA-109問題集です。
質問 # 172
What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?
正解：D
解説：
Shared Key Authentication is a security solution that was defined in the original 802.11 standard as an alternative to Open System Authentication, which does not provide any security at all.
Shared Key Authentication uses WEP (Wired Equivalent Privacy) to encrypt and authenticate data frames between the client station and the AP. However, WEP has been proven to be extremely vulnerable to various attacks that can easily crack the encryption key and compromise the network security. Therefore, Shared Key Authentication is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment.
質問 # 173
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?
正解：C
解説：
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. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-
109], page 223; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-
109], page 213.
質問 # 174
What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS? (Choose 2)
正解：B、D
解説：
The factors that will have the most significant impact on the amount of wireless bandwidth available to each station within a Basic Service Set (BSS) are:
A). The number of client stations associated to the BSS
More client stations sharing the same BSS will reduce the available bandwidth for each station, as all clients must share the available airtime.
C). The presence of co-located (10m away) access points on non-overlapping channels Even though the channels are non-overlapping, the presence of nearby access points can still impact performance due to contention for airtime, especially if the access points are close together. This can lead to interference and reduce overall efficiency.
質問 # 175
What is the maximum channel bandwidth supported by the 802.11ac amendment operating in the
5 GHz band?
正解：A
解説：
The 802.11ac amendment supports channel bonding up to 160 MHz in the 5 GHz band, in addition to 20 MHz, 40 MHz, and 80 MHz channel widths. While 160 MHz channels can significantly increase theoretical throughput, they also consume a large portion of the available 5 GHz spectrum and can be difficult to implement in real-world deployments due to limited channel availability and increased susceptibility to interference. 320 MHz channel widths were later introduced with 802.11be (Wi-Fi 7) in the 6 GHz band.
質問 # 176
What minimum signal level, typically expressed in negative dBm, represents the weakest signal that a receiver can successfully demodulate and decode at a specified data rate?
正解：C
解説：
Receiver sensitivity is the minimum RF signal level, expressed in dBm as a negative value (such as -70 dBm), at which a receiver can successfully demodulate and decode a signal at a given data rate while maintaining an acceptable bit error rate. Receiver sensitivity varies by data rate; higher data rates using more complex modulation schemes require a stronger received signal than lower data rates. This is why devices closer to an AP can achieve higher data rates than devices farther away, as the received signal degrades with distance.
質問 # 177
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多分、CWNA-109テスト質問の数が伝統的な問題の数倍である。CWNP CWNA-109試験参考書は全ての知識を含めて、全面的です。そして、CWNA-109試験参考書の問題は本当の試験問題とだいたい同じことであるとわかります。CWNA-109試験参考書があれば,ほかの試験参考書を勉強する必要がないです。
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