Student's Favourite Academy

Craig Ross Craig Ross

0 Course Enrolled • 0 Course Completed

Biography

CWNA-109日本語版問題集、CWNA-109認定テキスト

P.S. GoShikenがGoogle Driveで共有している無料かつ新しいCWNA-109ダンプ：https://drive.google.com/open?id=1rTjjiufN5OMdZEdAAZRQFveDwF2V4dmA

クライアントがCWNA-109学習実践ガイドを購入する前に、無料の試用版を無料で入手できます。クライアントは、当社のウェブサイトにログインして、製品のページにアクセスできます。製品のページには、CWNA-109試験資料に関する多くの重要な情報がリストされており、製品の価格、バージョン、更新時間、試験名とコード、質問と回答の合計額、CWNA-109便利なテストガイドと割引。この情報を見た後、CWNA-109有用なテストガイドを包括的に理解できます。

GoShikenは、CWNA-109試験資料によってCWNA-109試験に合格することを心から願っています。私たちの責任ある行動は、本能的な目的と信条です。長年この分野に専念することにより、私たちはCWNA-109学習問題に関する問題を確固たる自信をもって解決するために全能です。そして、CWNA-109試験問題で勉強する限り、CWNA-109学習ガイドは、99％〜100％の優れた品質と高い合格率を得るのに最適であることがわかります。

>> CWNA-109日本語版問題集 <<

最新のCWNP CWNA-109日本語版問題集は主要材料 & 公認されたCWNA-109: CWNP Wireless Network Administrator (CWNA)

IT業界で働いているあなたにとってのCWNPのCWNA-109試験の重要性を知っていますから、我々はあなたを助けられるCWNPのCWNA-109ソフトを開発しました。我々はあなたにすべての資料を探して科学的に分析しました。これらをするのはあなたのCWNPのCWNA-109試験を準備する圧力を減少するためです。

CWNP Wireless Network Administrator (CWNA) 認定 CWNA-109 試験問題 (Q49-Q54):

質問 # 49
The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)?

A. ERP-PBCC
B. DSSS-OFDM
C. HR/DSSS
D. OFDM

正解：D

解説：
OFDM (Orthogonal Frequency Division Multiplexing) is the physical layer specification (PHY) that VHT capable devices must be backward compatible with according to the IEEE 802.11-2012 standard. VHT (Very High Throughput) is a PHY and MAC enhancement that is defined in the IEEE 802.11ac amendment and is also known as Wi-Fi 5. VHT operates only in the 5 GHz band and uses features such as wider channel bandwidths (up to 160 MHz), higher modulation schemes (up to 256-QAM), more spatial streams (up to eight), multi-user MIMO (MU-MIMO), beamforming, and VHT PHY and MAC enhancements. VHT can achieve data rates up to 6.9 Gbps.
According to the IEEE 802.11-2012 standard, VHT capable devices must be backward compatible with devices using OFDM PHY, which is defined in the IEEE 802.11a amendment and is also used by IEEE 802.11 g, IEEE 802.11n, and IEEE 802.11h amendments. OFDM operates in both the 2.4 GHz and 5 GHz bands and uses features such as subcarriers, symbols, guard intervals, and OFDM PHY and MAC enhancements. OFDM can achieve data rates up to 54 Mbps.
Backward compatibility means that VHT capable devices can interoperate with OFDM devices on the same network by using common features and parameters that are supported by both PHYs. For example, VHT capable devices can use a channel bandwidth of 20 MHz, a modulation scheme of BPSK, QPSK, or 16-QAM, one spatial stream, no beamforming, and OFDM PHY and MAC headers when communicating with OFDM devices. Backward compatibility also means that VHT capable devices can fall back to OFDM mode when the signal quality or SNR is too low for VHT mode. References: 1, Chapter 3, page 123; 2, Section 3.2

質問 # 50
An IEEE 802.11 amendment is in the daft state. What impact does this draft amendment have on the 802.11 standard?

A. No impact: Until an amendment is ratified, it does not become part of the standard.
B. No impact: Draft amendments do not become part of the standard until a working group is formed.
C. Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
D. The standard is changed to reflect the new capabilities as soon as an amendment enters the draft stage.

正解：A

解説：
An IEEE 802.11 amendment is a proposed change or addition to the existing 802.11 standard, which defines the specifications and protocols for wireless LANs. An amendment goes through several stages of development, such as draft, sponsor ballot, and final approval, before it is ratified by the IEEE Standards Association and becomes part of the standard. Until then, it has no official impact on the standard, although some vendors may release products based on draft amendments to gain a competitive edge or to influence the final outcome of the amendment . References: [CWNA-109 Study Guide], Chapter 1: Overview of Wireless Standards, Organizations, and Fundamentals, page 25; [CWNA-109Study Guide], Chapter 1: Overview of Wireless Standards, Organizations, and Fundamentals, page 23; [IEEE website], IEEE-SA Standards Development Process.

質問 # 51
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?

A. 7 and 11
B. 2 and 8
C. 1 and 5
D. 4 and 6

正解：C

解説：
In the 2.4 GHz frequency band used for 802.11 wireless networks, the channel bandwidth is typically 20 MHz, but the actual frequency spread of each channel is about 22 MHz due to the modulation techniques used. This spread causes overlap between adjacent channels, which can lead to interference and degrade network performance. To avoid this, it's essential to use non-overlapping channels.
The three non-overlapping channels in the 2.4 GHz band are 1, 6, and 11. Each of these channels is spaced sufficiently apart to avoid interference with each other:
* Channel 1: Centered at 2.412 GHz.
* Channel 6: Centered at 2.437 GHz.
* Channel 11: Centered at 2.462 GHz.
Given the options provided, option C (1 and 5) is the closest to a pair of non-overlapping channels, although in practice, channel 5 would still cause some interference with channel 1 due to the 22 MHz spread. The ideal choice for non-overlapping channels would be any two channels among 1, 6, and 11, but this is not an option provided. Therefore, within the given options, 1 and 5 are the best choice, understanding that in a real-world scenario, 1 and 6 or 6 and 11 would be preferred to avoid overlap.
References:
* CWNA Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109, by David D: Coleman and David A. Westcott.
* Understanding 2.4 GHz channel arrangement and interference patterns in 802.11 wireless networks.

質問 # 52
You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?

A. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
B. All clients implement single spatial stream radios
C. The clients are all 802.11n STAs or lower
D. The short guard interval is also enabled

正解：C

解説：
https://7signal.com/802-11ac-migration-part-2-whats-nobodys-telling-you-about-80mhz-and-160mhz-channel- bonding The clients are all 802.11n STAs or lower is the likely cause of this behavior. If a WLAN with 100 802.11ac access points is configured to use 80 MHz channels, but only 40 MHz communications are seen in a particular BSS, it means that the clients in that BSS do not support 80 MHz channels. This could be because they are using older standards, such as 802.11n or lower, that do not support 80 MHz channels. Alternatively, they could be using newer standards, such as 802.11ac or ax, but have their channel width settings limited to 40 MHz or lower due to device capabilities or configuration options. In either case, the AP will adapt to the client's channel width and use only 40 MHz of the 80 MHz allocated bandwidth to communicate with them.
This will reduce the potential throughput and efficiency of the WLAN. References: , Chapter 3, page 111; , Section 3.2

質問 # 53
What can cause excessive VSWR in RF cables used to connect a radio to an antenna?

A. Radio output power above 100 mW but below 400 mw
B. High gain parabolic dish antenna
C. Impedance mismatch
D. High gain yagi antenna

正解：C

解説：
Impedance is the measure of opposition to the flow of alternating current (AC) in a circuit. Impedance mismatch occurs when the impedance of the radio does not match the impedance of the antenna or the cable.
This causes some of the transmitted or received signal to be reflected back, resulting in a loss of power and efficiency. The voltage standing wave ratio (VSWR) is a metric that indicates the amount of impedance mismatch in a transmission line. A higher VSWR means a higher impedance mismatch and a lower signal quality. A VSWR of 1:1 is ideal, meaning there is no impedance mismatch and no reflected power. A VSWR of 2:1 means that for every 2 units of forward power, there is 1 unit of reflected power12.
The other options are not correct because they do not affect the VSWR in RF cables. A high gain yagi antenna or a high gain parabolic dish antenna can increase the signal strength and directionality, but they do not cause impedance mismatch in the cable. Radio output power above 100 mW but below 400 mW is within the acceptable range for most WLAN devices and does not cause excessive VSWR in the cable3.: 1: CWNA-109 Official Study Guide, page 77 2: VSWR 3: CWNA-109 Official Study Guide, page 81

質問 # 54
......

CWNA-109試験問題の99％の合格率を確保できます。 CWNA-109学習ガイドを使用すると、CWNA-109試験に合格できます。そして、CWNPはあなたが想像できる正しいことです。必ずCWNA-109認定を希望します。そこで、CWNA-109試験資料と同じくらい優れたツールを使用して、わずか20〜30時間勉強して練習してから試験に合格してみませんか。さまざまなバージョンのCWNP Wireless Network Administrator (CWNA)試験ブレーンダンプを使用すると、いつでもどこでも勉強と練習ができます。

CWNA-109認定テキスト: https://www.goshiken.com/CWNP/CWNA-109-mondaishu.html

そして、CWNPはお客様にディスカウントコードを提供でき、CWNA-109復習教材をより安く購入できます、CWNP CWNA-109日本語版問題集昔のことわざにあるように、敵とあなた自身を知っているので、敗北の危険なしに100回戦うことができます、CWNP CWNA-109日本語版問題集ほとんどの場合、クレジットカードをサポートしています、お客様は弊社のCWNP CWNA-109問題集を購入する前に、我々のサイトで無料のサンプルをダウンロードして試すことができます、CWNP CWNA-109日本語版問題集あなたがいつも躊躇しているなら、あなたは決して進歩しません、そして、弊社は定期的にCWNA-109試験参考書を検査し、問題の答えの正確率を確保しています。

別のモノを要求すると云う、要するに、中国人は経済の必要性に注意を払うだけです、そして、CWNPはお客様にディスカウントコードを提供でき、CWNA-109復習教材をより安く購入できます、昔のことわざにあるように、敵とあなた自身を知っているので、敗北の危険なしに100回戦うことができます。

試験の準備方法-完璧なCWNA-109日本語版問題集試験-信頼的なCWNA-109認定テキスト

ほとんどの場合、クレジットカードをサポートしています、お客様は弊社のCWNP CWNA-109問題集を購入する前に、我々のサイトで無料のサンプルをダウンロードして試すことができます、あなたがいつも躊躇しているなら、あなたは決して進歩しません。

さらに、GoShiken CWNA-109ダンプの一部が現在無料で提供されています：https://drive.google.com/open?id=1rTjjiufN5OMdZEdAAZRQFveDwF2V4dmA

NOW ENROLLING FOR CRASH COURSE I.C.S.E. 2025 - 26 GRADE IX AND X