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CWNP CWNA-109 Exam Syllabus Topics:

TopicDetails
Topic 1
  • 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.
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
  • 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 5
  • 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.

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

NEW QUESTION # 142
What security protocol, mandated by the Wi-Fi Alliance, replaced WPA2 and introduced Simultaneous Authentication of Equals (SAE) as a replacement for the PSK four-way handshake?

Answer: A

Explanation:
WPA3 is the current WLAN security certification from the Wi-Fi Alliance, and it introduced Simultaneous Authentication of Equals (SAE) as a replacement for the WPA2-Personal pre- shared key exchange. SAE, based on the Dragonfly key exchange protocol, protects against offline dictionary attacks by requiring an interactive exchange between the client and AP for each authentication attempt, unlike the older four-way handshake which could be captured and attacked offline. WPA3 also introduced mandatory Protected Management Frames (PMF).


NEW QUESTION # 143
What term describes the ratio between the desired signal strength and the level of background RF noise present at a receiver?

Answer: A

Explanation:
Signal-to-Noise Ratio (SNR) is the difference, expressed in dB, between the strength of the desired received signal and the level of background RF noise, or noise floor, at the receiver. A higher SNR value generally indicates better signal quality and allows for higher data rates and more reliable communication. A low SNR, even with a strong received signal, can still result in poor performance if the noise floor is also elevated, such as in an RF-noisy environment.


NEW QUESTION # 144
What feature of 802.1 lax (HE) is managed with beacon and trigger frames and is primarily a power management method, but also provides more efficient access to the channel used within a BSS?

Answer: B


NEW QUESTION # 145
You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems.
Based on this information, what is the likely cause of the problem?

Answer: B

Explanation:
The likely cause of the problem is that the external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use. USB 3.0 devices are known to generate radio frequency interference (RFI) in the 2.4 GHz band due to their high data transfer rates and harmonics. This RFI can increase the noise floor and degrade the signal-to-noise ratio (SNR) of WLAN devices operating in the same band. This can result in lower data rates, reduced throughput, increased retransmissions, and poor performance. The problem may not occur outside of business hours or on the user's home network because of different usage patterns or environmental factors.


NEW QUESTION # 146
What WLAN architecture uses lightweight access points that tunnel all traffic back to a centralized controller, and where does client data typically get bridged onto the wired network?

Answer: A

Explanation:
In a controller-based architecture using centralized data forwarding, lightweight access points tunnel client traffic back to the WLAN controller using a protocol such as CAPWAP. The controller then bridges the traffic onto the wired network. This centralized approach simplifies VLAN management and policy enforcement but can create a bottleneck at the controller in large deployments. Some controller-based architectures instead use local, or distributed, data forwarding, where the AP bridges traffic directly onto the local wired network.


NEW QUESTION # 147
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