CWNA-109実際試験、CWNA-109受験対策

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CWNP CWNA-109 Exam Syllabus Topics:

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

>> CWNA-109実際試験 <<

検証するCWNA-109実際試験試験-試験の準備方法-ハイパスレートのCWNA-109受験対策

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CWNP Wireless Network Administrator (CWNA) 認定 CWNA-109 試験問題 (Q155-Q160):

質問 # 155
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?

正解：A

解説：
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.


質問 # 156
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?

正解：A

解説：
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers) is a Fresnel Zone that is at least 60% clear of obstructions. The Fresnel Zone is an elliptical-shaped area around the line-of-sight path between two antennas that reflects and refracts the RF waves. The Fresnel Zone radius depends on the frequency of the RF signal and the distance between the antennas. For optimal performance, the Fresnel Zone should be at least 60% clear of any obstructions that may cause interference, attenuation, or multipath fading. The minimum output power level, antenna gain, and antenna type may vary depending on the environmental conditions and regulatory constraints, but they are not always required for a high quality RF link. References: [CWNP Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 75; [CWNA: Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page
65.


質問 # 157
Why is it generally recommended to design overlapping coverage cells with approximately 15-
20% overlap between adjacent access points in an enterprise WLAN?

正解：B

解説：
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.


質問 # 158
What security solution is required to be used in place of Open System Authentication for all open network 802.11 implementations in the 6 GHz band?

正解：D


質問 # 159
Which antenna type radiates RF energy equally in all directions in a spherical pattern and is used primarily as a theoretical reference for calculating antenna gain?

正解：B

解説：
An isotropic radiator is a theoretical, hypothetical antenna that radiates RF energy equally in all directions, forming a perfect sphere. It does not exist in reality but is used as a baseline reference point for measuring antenna gain, expressed in dBi (decibels relative to an isotropic radiator). All real-world antennas focus energy in some directions more than others, and their gain is calculated by comparing their radiation pattern to that of the isotropic radiator.


質問 # 160
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