Reliable CWNA-109 Test Dumps - Answers CWNA-109 Real Questions

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CWNP CWNA-109 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: WLAN Network Security15%- Authentication and encryption
  • 1. WPA2/WPA3, 802.1X, EAP
- Security threats and mitigation
  • 1. Attacks, monitoring, and hardening
Topic 2: Radio Frequency (RF) Technologies20%- RF fundamentals and behavior
  • 1. RF signals and characteristics
  • 2. RF mathematics and measurements
- Antenna concepts and types
  • 1. Signal propagation and coverage
  • 2. Antenna operation and selection
Topic 3: WLAN Protocols and Devices20%- Wireless hardware and software
  • 1. Access points, controllers, and clients
  • 2. Power over Ethernet (PoE)
- 802.11 frame types and formats
  • 1. Frame exchange and channel access
Topic 4: WLAN Network Architecture and Design Concepts15%- WLAN deployment architectures
  • 1. Roaming and mobility
  • 2. Coverage and capacity planning
- Network design principles
  • 1. Site survey methodologies
Topic 5: WLAN Regulations and Standards15%- IEEE 802.11 standards and amendments
  • 1. PHY and MAC layer specifications
- Regulatory bodies and frequency bands
  • 1. Transmit power and channel rules
Topic 6: WLAN Troubleshooting and Management15%- Performance and connectivity issues
  • 1. Interference, coverage, and configuration problems
- Monitoring and maintenance
  • 1. Management protocols and tools

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CWNP Wireless Network Administrator (CWNA) Sample Questions (Q11-Q16):

NEW QUESTION # 11
A wireless engineer is troubleshooting an area where far-away clients associated with an AP experience poor performance because a nearby client is transmitting at a much higher signal level, effectively drowning out the weaker signal at the receiver. What is this condition called?

Answer: D

Explanation:
The near/far problem occurs when a client station located close to an access point transmits at a much higher received signal strength than a client station located farther away. This disparity can cause the AP's receiver to have difficulty properly receiving the weaker, distant signal, particularly if the strong nearby signal is transmitting at the same time or causing elevated noise levels. This can effectively "drown out" the distant client, resulting in poor performance or connectivity issues for stations farther from the AP.


NEW QUESTION # 12
What best describes WPA2 in relation to 802.11 wireless networks?

Answer: C

Explanation:
WPA2 (Wi-Fi Protected Access 2) is a security certification program developed by the Wi-Fi Alliance to secure wireless computer networks. It is important to understand the following:
* WPA2 and the 802.11 Standard: While WPA2 is based on elements of the 802.11i amendment to the
802.11 standard, it is not itself a standard but rather a certification to ensure devices comply with certain security criteria, including the correct implementation of CCMP (Counter Mode Cipher Block Chaining Message Authentication Code Protocol) and AES (Advanced Encryption Standard).
* CCMP/AES Implementation: WPA2 enhances the security of wireless networks by using CCMP for encryption, which is based on AES, a robust encryption algorithm. This represents a significant security improvement over WEP (Wired Equivalent Privacy) and WPA (Wi-Fi Protected Access) that used TKIP (Temporal Key Integrity Protocol).
* WPA vs. WPA2: WPA was the interim security enhancement over WEP, utilizing TKIP for encryption. WPA2, however, moved to the more secure AES-based encryption method. Contrary to option C, WPA2 does not enhance security by using TKIP; it uses CCMP/AES.
Therefore, option B correctly describes WPA2 as a certification program ensuring devices properly implement the more secure CCMP/AES encryption methods.
References:
Wi-Fi Alliance website for WPA2 certification details.
IEEE 802.11i-2004: Amendment for Enhanced Security.


NEW QUESTION # 13
What condition occurs when two or more APs operating on the same channel are within range of each other, causing them to share airtime through the CSMA/CA contention process?

Answer: B

Explanation:
Co-channel interference (CCI) occurs when two or more APs, or BSSs, are configured on the same channel and are within range of each other. Because they operate on the same channel, they must share airtime using the CSMA/CA contention mechanism, meaning only one device can transmit at a time to avoid frame corruption. While technically not "interference" in the destructive sense of corrupting a signal, CCI reduces available airtime and overall network throughput as more devices compete for the same channel.


NEW QUESTION # 14
Which one of the following channels can be used for VHT transmissions according to the 802.11 specification?

Answer: B

Explanation:
The channel that can be used for VHT transmissions according to the 802.11 specification is channel 144. VHT stands for Very High Throughput and is the PHY layer specification for
802.11ac devices. VHT transmissions can use channel bandwidths of 20 MHz, 40 MHz, 80 MHz, or 160 MHz in the 5 GHz band. Channel 144 is one of the channels in the 5 GHz band that can support VHT transmissions with any of these bandwidths. Channel 6, channel 1, and channel 11 are channels in the 2.4 GHz band that cannot support VHT transmissions, as they are only compatible with legacy (802.11b/g/n), HT (802.11n), or ERP (802.11g) transmissions with up to
20 MHz bandwidth.


NEW QUESTION # 15
You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?

Answer: C

Explanation:
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.


NEW QUESTION # 16
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