CWNA-109 Test Lab Questions & CWNA-109 Latest Exam Topics & CWNA-109 Study Questions Files

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CWNP CWNA-109 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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.
Topic 2
  • 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.
Topic 3
  • 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.
Topic 4
  • Radio Frequency (RF) Technologies: This topic explains the basic features and behavior of RF. It also discusses applying the basic concepts of RF mathematics and measurement. Lastly, the topic covers RF signal characteristics and the functionality of RF antennas.

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CWNP Wireless Network Administrator (CWNA) Sample Questions (Q142-Q147):

NEW QUESTION # 142
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?

Answer: A

Explanation:
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.


NEW QUESTION # 143
What authentication method is referenced in the 802.11-2016 and 802.11-2020 specifications and is recommended for robust WI-AN client security?

Answer: C

Explanation:
The authentication method that is referenced in the 802.11-2016 and 802.11-2020 specifications and is recommended for robust WLAN client security is 802.1X/EAP. 802.1X/EAP stands for IEEE 802.1X Port-Based Network Access Control with Extensible Authentication Protocol and is a framework that provides strong authentication and dynamic encryption key generation for WLAN clients. 802.1X/EAP involves three parties: the supplicant (the client), the authenticator (the AP or the controller), and the authentication server (usually a RADIUS server). The supplicant sends its credentials (such as username and password, certificate, or token) to the authenticator, which forwards them to the authentication server. The authentication server verifies the credentials and sends a response to the authenticator, which grants or denies access to the supplicant. The authentication server also generates a master key that is used to derive encryption keys for the data frames between the supplicant and the authenticator. 802.1X/EAP supports various EAP methods that offer different levels of security and flexibility, such as EAP- TLS, EAP-PEAP, EAP-TTLS, EAP-FAST, and EAP-SIM. SSL, IPSec, and WEP are not authentication methods, but rather encryption or security protocols that are not specific to WLANs or referenced in the 802.11 specifications.


NEW QUESTION # 144
You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?

Answer: D

Explanation:
The common spectrum analyzer view that you should use for this analysis is the Waterfall/Spectrogram view. The Waterfall/Spectrogram view shows the signal from the interfering device over time on a three-dimensional graph. The x-axis represents frequency, the y- axis represents time, and the z-axis represents amplitude or power. The color of each pixel indicates the signal strength at a given frequency and time. The Waterfall/Spectrogram view can help you identify the characteristics of the interference source, such as its frequency range, duty cycle, modulation type, and pattern.


NEW QUESTION # 145
Why is it generally recommended to design overlapping coverage cells with approximately 15-
20% overlap between adjacent access points in an enterprise WLAN?

Answer: D

Explanation:
Designing for approximately 15-20% cell overlap between adjacent access points ensures that a client station roaming from one AP's coverage area to another maintains an adequate signal level throughout the transition, allowing it to roam to the new AP before completely losing connectivity to the previous one. Too little overlap can result in coverage gaps or dropped connections during roaming, while excessive overlap can increase co-channel interference between APs operating on the same channel.


NEW QUESTION # 146
Which 802.11 amendment introduced Target Wake Time (TWT) as a mechanism to improve battery life for client devices?

Answer: A

Explanation:
Target Wake Time (TWT) was introduced with 802.11ax (Wi-Fi 6). TWT allows an AP and client station to negotiate specific times, or schedules, during which the client will wake up to transmit or receive data, and can otherwise remain in a low-power sleep state. This significantly improves battery life for client devices, particularly IoT devices, by reducing the amount of time radios need to remain awake and actively contending for the medium.


NEW QUESTION # 147
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