BONUS！！！ JPTestKing CWNA-109ダンプの一部を無料でダウンロード：https://drive.google.com/open?id=1hAJ0QBofNaP4zD8u3E42FjZPFARearhk
認証を取得するのは給料を高める重要なものです。CWNA-109試験に参加する人にとって、CWNA-109試験を心配する必要がありません。最新の問題集を入手したら、CWNA-109試験に順調に合格することができます。この問題集はPDF版、ソフト版とオンライン版を含めています。CWNA-109試験のすべての領域を全面的に含めています。
| トピック | 出題範囲 |
|---|---|
| トピック 1 |
|
| トピック 2 |
|
| トピック 3 |
|
ひとつには、当社JPTestKingはCWNA-109試験トレントを編集するために、この分野の多くの有力な専門家を採用しているので、CWNA-109問題トレントの高品質について確実に安心できます。 一方、CWNA-109学習教材の指導の下で試験を準備したお客様の間での合格率は98％〜100％に達しました。 さらに、CWNA-109認定資格を取得することが確実であるため、CWNA-109質問CWNPトレントをCWNP Wireless Network Administrator (CWNA)使用した後、近い将来昇進と昇給を得る機会が増えます。
質問 # 176
When a STA has authenticated to an AP (AP-1), but still maintains a connection with another AP (AP-2), what is the state of the STA on AP-1?
正解：A
解説：
Authenticated and Unassociated. According to one of the web search results1, a STA can be authenticated to multiple APs, but it can only be associated to one AP at a time. Association is the process of establishing a logical link between the STA and the AP, which allows the STA to send and receive data frames through the AP2. Therefore, when a STA has authenticated to an AP-1, but still maintains a connection with another AP-
2, it means that the STA is authenticated to both APs, but only associated to AP-2. The state of the STA on AP-1 is authenticated and unassociated, which means that the STA can switch to AP-1 without repeating the authentication process, but it cannot send or receive data frames through AP-1 until it becomes associated.
質問 # 177
When using a spectrum to look for non Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a users workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?
正解：B
解説：
USB 3 devices in the user's work area are the most likely cause of this interference when using a spectrum analyzer to look for non-Wi-Fi interference sources. A spectrum analyzer is a tool that measures and visualizes the radio frequency activity and interference in the wireless environment. A spectrum analyzer can show the spectrum usage and energy levels on each frequency band or channel and help identify and locate the sources of interference. Interference is any unwanted signal that disrupts or degrades the intended signal on a wireless channel. Interference can be caused by various sources, such as other Wi-Fi devices, non-Wi-Fi devices, or natural phenomena. Interference can affect WLAN performance and quality by causing signal loss, noise, distortion, or errors. USB 3 devices are non-Wi-Fi devices that use USB 3.0 technology to transfer data at high speeds between computers and peripherals, such as hard drives, flash drives, cameras, or printers.
USB 3 devices can generate electromagnetic radiation that interferes with Wi-Fi signals in the 2.4 GHz band, especially when they are close to Wi-Fi devices or antennas. USB 3 devices can cause significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a user's workspace, but the interference disappears quickly after just 2 meters. This is because USB 3 devices emit broadband interference that affects all channels in the 2.4 GHz band with a high intensity near the source but a low intensity at a distance due to attenuation. The other options are not likely to cause this interference pattern when using a spectrum analyzer to look for non-Wi-Fi interference sources. Bluetooth devices in the user's work area are non-Wi-Fi devices that use Bluetooth technology to communicate wirelessly between computers and peripherals, such as keyboards, mice, headphones, or speakers. Bluetooth devices can cause interference with Wi-Fi signals in the 2.4 GHz band, but they use frequency hopping spread spectrum (FHSS) technique that changes frequencies rapidly and randomly within a range of 79 channels. Therefore, Bluetooth devices do not cause significant interference across the entire 2.4 GHz band (not on a few select frequencies), but rather intermittent interference on some channels at different times. Excess RF energy from a nearby AP is not a non-Wi-Fi interference source but rather a Wi-Fi interference source that occurs when an AP transmits more power than necessary for its coverage area. Excess RF energy from a nearby AP can cause co- channel interference (CCI) with other APs or client devices that use the same channel within range of each other. CCI reduces performance and capacity because it causes contention and collisions on the wireless medium,
質問 # 178
What cause of hidden nodes within a BSS would be more likely lead to an increase in collisions and retries?
正解：B
質問 # 179
You have been tasked with creating a wireless link between two buildings on a single campus.
The link must support at least 150 Mbps data rates. What kind of WLAN technology role should you deploy?
正解：B
解説：
Wireless bridging is a WLAN technology role that allows two or more networks to be connected wirelessly over a distance. A wireless bridge consists of two or more APs that are configured to operate in bridge mode and use directional antennas to establish a point-to-point or point-to- multipoint link. Wireless bridging can support high data rates and is suitable for scenarios where running cables is impractical or expensive. To create a wireless link between two buildings on a single campus that supports at least 150 Mbps data rates, wireless bridging is an appropriate solution.
質問 # 180
What statement about 802.11 WLAN performance is true?
正解：D
解説：
The statement that in modern networks, both centralized and distributed data forwarding work well for most standard office deployments is true about WLAN performance. Data forwarding refers to how wireless frames are transmitted from wireless clients to wired networks or vice versa through wireless access points (APs). Centralized data forwarding means that all wireless frames are sent to a central controller or gateway before being forwarded to their destinations.
Distributed data forwarding means that wireless frames are forwarded directly by the APs to their destinations without going through a central controller or gateway. Both methods have their advantages and disadvantages, depending on the network size, topology, traffic pattern, security, and management requirements. However, in modern networks, both methods can achieve high performance and scalability for most standard office deployments, as they can leverage advanced features such as fast roaming, load balancing, quality of service, and encryption. The other statements about WLAN performance are false. In most WLANs, special skill or tuning is required to get peak performance, such as selecting the appropriate channel, power, data rate, and antenna settings. WLANs perform worse as more wireless clients connect with each AP, as they cause more contention and interference on the wireless medium. To get the best performance out of an AP, you should not disable data rates of 72 Mbps and lower, as they are needed for backward compatibility and range extension.
質問 # 181
......
JPTestKingはこのキャリアの第一人者となり、世界中の試験受験者が貴重な時間で勝利するのを助けています。 CWNA-109試験の長年の経験により、CWNA-109試験問題に明確に現れる知識を徹底的に把握しています。 知っておくべきすべてのCWNA-109学習資料には、選択できる3つのバージョンが記載されています。 CWNA-109試験に変更が生じた場合、専門家はその傾向に注意を払い、絶えず新しい更新をコンパイルします。 つまり、後で新しいアップデートを無料で提供します。
CWNA-109認証pdf資料: https://www.jptestking.com/CWNA-109-exam.html
無料でクラウドストレージから最新のJPTestKing CWNA-109 PDFダンプをダウンロードする：https://drive.google.com/open?id=1hAJ0QBofNaP4zD8u3E42FjZPFARearhk