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경쟁율이 심한 IT시대에CWNP CWNA-109인증시험을 패스하여 자격증을 취득함으로 IT업계 관련 직종에 종사하고자 하는 분들에게는 아주 큰 가산점이 될수 있고 자신만의 위치를 보장할수 있으며 더욱이는 한층 업된 삶을 누릴수 있을수도 있습니다. CWNP CWNA-109 덤프로 CWNP CWNA-109 시험에서 실패하면 덤프비용을 보상해드리기에 안심하고 시험준비하셔야 합니다.
| Section | Objectives |
|---|---|
| WLAN Security and Management | - Security mechanisms and monitoring
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| 802.11 Protocol and MAC Layer | - Frame types and communication process
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| WLAN Network Design | - Design principles and planning
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| RF Technologies and Fundamentals | - Radio frequency principles and behavior
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| WLAN Regulations and Standards | - Wireless standards and amendments
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| WLAN Infrastructure and Devices | - Access points and client devices
|
네트웨크시대인 지금 인터넷에 검색하면 수많은CWNP인증 CWNA-109시험공부자료가 검색되는데 그중에서도Fast2test에서 출시한 CWNP인증 CWNA-109덤프가 가장 높은 인지도를 지니고 있습니다. CWNP인증 CWNA-109덤프에는CWNP인증 CWNA-109시험문제의 기출문제와 예상문제가 수록되어있어 덤프에 있는 문제만 잘 공부하시면 시험은 가볍게 패스가능합니다. CWNP인증 CWNA-109시험을 통과하여 자겨증취득하는 꿈에 더욱 가까이 다가가세요.
질문 # 39
802.11ax (HE) introduces Resource Units that can be used to allow communications with multiple devices at the same time, on the same channel, in the same BSS. What feature of 802.1 lax provides this functionality?
정답：D
설명：
The feature of 802.11ax (HE) that provides this functionality is OFDM A . OFDMA stands for Orthogonal Frequency Division Multiple Access and is a technology that allows multiple devices to communicate simultaneously on the same channel in the same BSS. OFDMA works by dividing a channel into smaller subchannels called Resource Units (RUs), which are composed of groups of subcarriers or tones. Each RU can be assigned to a different device based on its bandwidth requirement and signal quality. This way, OFDMA can increase the efficiency and capacity of the channel by reducing overhead, contention, and latency. OFDMA can also support both uplink and downlink multi-user transmissions using trigger frames and buffer status reports.
6 GHz support, TWT, and Wi-Fi-LTE are not features of 802.11ax that provide this functionality.
질문 # 40
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?
정답：A
설명：
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.
질문 # 41
You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?
정답：B
설명：
A Wi-Fi scanner is a basic tool that can be used to easily locate areas of high co-channel interference. A Wi- Fi scanner is a software application that can run on a laptop, tablet, smartphone, or other device that has a Wi- Fi adapter. A Wi-Fi scanner can scan the wireless environment and display information about the detected access points and client stations, such as their SSID, BSSID, channel, signal strength, security, and data rate.
A Wi-Fi scanner can also show the channel utilization and overlap of different access points, which can indicate the level of co-channel interference. Co-channel interference is a type of interference that occurs when multiple access points use the same or adjacent channels within the same coverage area. Co-channel interference can reduce the throughput and performance of the WLAN, as the access points and client stations have to contend for the channel access and avoid collisions. To identify areas of high co-channel interference, a Wi-Fi scanner can be used to measure the signal strength and channel utilization of different access points and compare them with a threshold or a baseline. Alternatively, a Wi-Fi scanner can also use a color-coded heat map to visualize the co-channel interference level in different locations. References: 1, Chapter 7, page
279; 2, Section 4.3
질문 # 42
You administer a WLAN that offers a guest SSID of GUESTNWORK. Users connect to the GUESTNWORK SSID, but report that they cannot browse the Internet. The devices simply report no Internet connection. What common problem causes this scenario?
정답：C
설명：
A common problem that causes this scenario is captive portal issues. A captive portal is a web page that requires users to authenticate or accept terms and conditions before accessing the Internet through a WLAN. A captive portal is often used for guest networks to provide security and control over the network access. A captive portal works by intercepting the user's web requests and redirecting them to the portal page until the user completes the required action. However, sometimes the captive portal may not work properly due to various reasons, such as browser settings, firewall rules, DNS configuration, or network errors. This can prevent the user from browsing the Internet or seeing the portal page. To troubleshoot captive portal issues, you can try to use a different browser, clear the browser cache andcookies, disable any VPN or proxy settings, manually enter the portal URL, or contact the network administrator. NTP issues, hardware issues, or IP routing issues are not common problems that cause this scenario. References: [CWNP Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 343; [CWNA: Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 333.
질문 # 43
A wireless engineer wants to enable both legacy 802.11b clients and modern 802.11ax clients to associate with the same 2.4 GHz SSID. What is a drawback of enabling this level of backward compatibility?
정답：D
설명：
When a BSS supports both legacy 802.11b clients and newer high-throughput clients like
802.11ax, protection mechanisms such as RTS/CTS or CTS-to-Self must be used to prevent collisions between devices using different modulation schemes that cannot always detect each other's transmissions. These protection mechanisms consume additional airtime and overhead, reducing the overall throughput and efficiency available to all clients in the BSS, including the newer, faster devices. For this reason, many administrators choose to disable 802.11b data rates entirely on modern networks.
질문 # 44
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