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[General] CWNP CWNA-109 VCE Dumps & Testking IT echter Test von CWNA-109

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【General】 CWNP CWNA-109 VCE Dumps & Testking IT echter Test von CWNA-109

Posted at yesterday 18:11      View：15 | Replies：0        Print      Only Author   [Copy Link] 1#
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CWNP CWNA-109 Prüfungsplan:
ThemaEinzelheiten
Thema 1
  • WLAN Regulations and Standards: The topic discusses the roles of WLAN and networking industry organizations. It also addresses the concepts of various Physical Layer (PHY) solutions, spread spectrum technologies, and 802.11 WLAN functional concepts.
Thema 2
  • WLAN Network Security: It addresses the concepts of weak security options, security mechanisms for enterprise WLANs, and security options and tools used in wireless networks.
Thema 3
  • RF Validation and WLAN remediation: This topic covers RF interference, WLAN performance, the basic features of validation tools, and common wireless issues.
Thema 4
  • WLAN Protocols and Devices: It focuses on terminology related to the 802.11 MAC and PHY, the purpose of the three main 802.11 frame types, MAC frame format, and 802.11 channel access methods.
Thema 5
  • WLAN Network Architecture and Design Concepts: This topic deals with describing and implementing Power over Ethernet (PoE). Furthermore, the topic covers different wireless LAN architectures, coverage requirements, roaming considerations, and common proprietary features in wireless networks.

Echte und neueste CWNA-109 Fragen und Antworten der CWNP CWNA-109 ZertifizierungsprüfungObwohl wir schon vielen Prüfungskandidaten erfolgreich geholfen, die CWNP CWNA-109 zu bestehen, sind wir nicht selbstgefällig, weil wir die heftige Konkurrenz im IT-Bereich wissen. Deshalb müssen wir uns immer verbessern, um nicht zu ausscheiden. Unser Team aktualisiert die Prüfungsunterlagen der CWNP CWNA-109 immer rechtzeitig. Damit können unsere Kunden die neueste Tendenz der CWNP CWNA-109 gut folgen.
CWNP Wireless Network Administrator (CWNA) CWNA-109 Prüfungsfragen mit Lösungen (Q41-Q46):41. Frage
You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?
  • A. The clients are only two stream 802.11ax clients
  • B. Contention caused by an overlapping BSS
  • C. The clients are 802.11n devices
  • D. Non-Wi-Fi interference in the channel
Antwort: C
Begründung:
The scenario described suggests that while the Access Point (AP) is capable of 802.11ax (Wi-Fi 6) with four spatial streams, the clients are only achieving data rates typical of 802.11n (Wi-Fi 4) devices, which indicates that the clients are likely 802.11n devices. Here's why this is the most plausible explanation:
* 802.11n Limitations: Devices that adhere to the 802.11n standard have lower maximum data rates compared to 802.11ax devices due to differences in technology such as modulation, spatial streams, and channel bandwidth. An 802.11n device with a single spatial stream operating on a 20 MHz channel can achieve a maximum data rate of 72.2 Mbps. Even with two spatial streams under ideal conditions, this would only double to approximately 144.4 Mbps, which is close to the 150 Mbps mentioned.
* Spatial Stream Capability: The fact that the AP supports four spatial streams suggests it can achieve much higher data rates with 802.11ax clients that also support multiple spatial streams. However, if the clients are 802.11n devices, they may not be capable of using more than two spatial streams, and many earlier 802.11n devices were limited to just one.
The other options are less likely to be the primary cause based on the information provided:
* B. Two Stream 802.11ax Clients: If the clients were 802.11ax with only two spatial streams, they would likely achieve higher data rates than 150 Mbps due to the efficiency improvements in 802.11ax.
* C. Contention and D. Non-Wi-Fi Interference: While these could affect performance, they would not inherently limit clients to 150 Mbps,especially in the context of an 802.11ax environment where mechanisms to handle interference and contention are more advanced.
References:
* IEEE 802.11n-2009: Enhancements for Higher Throughput.
* CWNA Certified Wireless Network Administrator Official Study Guide: Exam PW0-105, by David D.
Coleman and David A. Westcott.

42. Frage
What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?
  • A. TVHT
  • B. DSSS
  • C. DMG
  • D. SIG
Antwort: A
Begründung:
TVHT stands for Television Very High Throughput and it is a PHY defined by the 802.11af amendment. It uses the TV white space (TVWS) spectrum in the VHF and UHF bands between 54 and 790 MHz, which are not in use by broadcast video signals at the time. It can provide long-range and low-power connectivity for WLAN devices.

43. Frage
ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey.
During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using 802.3 PoE.
After hearing this information, what immediate concerns do you note?
  • A. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for
    802.11 APs
  • B. The edge Ethernet switches should support Ether-channel to get the best results out of the network.
  • C. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.
  • D. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.
Antwort: C
Begründung:
An immediate concern that you note after hearing this information is that the power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices. PoE stands for Power over Ethernet and is a technology that allows Ethernet switches to deliver power along with data to devices such as VoIP phones and 802.11 access points. PoE devices are classified into different classes based on their power consumption and output. The edge switches have a limited power budget that determines how many PoE devices they can support simultaneously. If the power budget is exceeded, some PoE devices may not receive enough power or may shut down unexpectedly. Therefore, it is important to plan and monitor the power budget in the edge switches based on the number and class of PoE devices connected to them. Using Ether-channel, placing switches in optimal locations, or avoiding distortion are not immediate concerns related to PoE devices. References: [CWNP Certified Wireless Network Administrator Official Study Guide:
Exam CWNA-109], page 234; [CWNA: Certified Wireless Network Administrator Official Study Guide:
Exam CWNA-109], page 224.

44. Frage
What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?
  • A. Use a spectrum analyzer to monitor RF activity during a VoIP call.
  • B. Place a call with the handset and move around the facility to test quality during roaming.
  • C. Use a protocol analyzer to capture the traffic generated when a laptop roams.
  • D. Use the built-in roaming monitor built into all VoIP handsets.
Antwort: B
Begründung:
The most effective method for testing roaming in relation to 802.11 VoIP handsets is to place a call with the handset and move around the facility to test quality duringroaming. This method allows you to evaluate the actual performance and user experience of VoIP calls over wireless networks, as well as identify any potential issues such as signal strength, interference, latency, jitter, packet loss, or handoff delays. A spectrum analyzer can only show you the RF activity during a VoIP call, but not how it affects the voice quality or roaming behavior. A protocol analyzer can capture the traffic generated when a laptop roams, but it cannot simulate the characteristics of a VoIP handset such as battery life, antenna design, codec support, or QoS features. A built-in roaming monitor is not a common feature in all VoIP handsets, and it may not provide accurate or comprehensive information about the roaming process. References: [CWNP Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 487; [Voice over Wireless LAN 4.1 Design Guide], page 6-19.

45. Frage
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. The short guard interval is also enabled
  • C. All clients implement single spatial stream radios
  • D. The clients are all 802.11n STAs or lower
Antwort: D
Begründung:
https://7signal.com/802-11ac-mig ... d-160mhz-channel-bo 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, butonly 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

46. Frage
......
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