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CWNP CWNA-109 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: WLAN Protocols and Devices20%- 802.11 frame types and formats
  • 1. Frame exchange and channel access
- Wireless hardware and software
  • 1. Power over Ethernet (PoE)
  • 2. Access points, controllers, and clients
Topic 2: WLAN Network Security15%- Authentication and encryption
  • 1. WPA2/WPA3, 802.1X, EAP
- Security threats and mitigation
  • 1. Attacks, monitoring, and hardening
Topic 3: Radio Frequency (RF) Technologies20%- RF fundamentals and behavior
  • 1. RF mathematics and measurements
  • 2. RF signals and characteristics
- Antenna concepts and types
  • 1. Antenna operation and selection
  • 2. Signal propagation and coverage
Topic 4: 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
Topic 5: WLAN Troubleshooting and Management15%- Monitoring and maintenance
  • 1. Management protocols and tools
- Performance and connectivity issues
  • 1. Interference, coverage, and configuration problems
Topic 6: 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

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CWNP Wireless Network Administrator (CWNA) Sample Questions (Q95-Q100):

NEW QUESTION # 95
What is a common source of RF interference in the 2.4 GHz ISM band that does not originate from an 802.11 device?

Answer: A

Explanation:
Microwave ovens are a well-known source of non-802.11 RF interference in the 2.4 GHz ISM band, as they operate by emitting energy at frequencies that overlap with the Wi-Fi spectrum, particularly around channel 9-11. Other common non-802.11 interference sources in this band include cordless phones, Bluetooth devices, wireless video cameras, and certain types of industrial, scientific, and medical equipment. These devices do not follow 802.11 protocols and can cause unpredictable interference that a spectrum analyzer is needed to identify, since standard Wi-Fi survey tools cannot detect non-802.11 energy.


NEW QUESTION # 96
What modulation and multiplexing technique, used by 802.11a/g/n/ac/ax, divides a wireless channel into multiple narrow, orthogonal subcarriers to transmit data in parallel?

Answer: C

Explanation:
Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique that divides a wireless channel into many smaller, overlapping but mathematically orthogonal subcarriers. Data is transmitted in parallel across these subcarriers simultaneously, which improves spectral efficiency and provides resistance to multipath interference. OFDM was first used in WLANs by the 802.11a amendment and has remained the foundational modulation technique for 802.11g,
802.11n, 802.11ac, and 802.11ax (with the addition of OFDMA).


NEW QUESTION # 97
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?

Answer: D

Explanation:
The data rate of a signal is the speed that the data bits in individual 802.11 data frames are sent, but it does not account for the actual amount of data that can be transmitted over time. The throughput of a connection is the flow of information over time, which is affected by various factors such as data encoding, modulation, encryption, airtime utilization, noise levels, interference, etc. Therefore, the throughput is always lower than the data rate. According to one of the web search results1, the actual throughput is normally 60-70 percent of the supported data rates. So, for a connection with a data rate of 150 Mbps, the expected throughput would be around 90-105 Mbps.


NEW QUESTION # 98
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: D

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. 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.


NEW QUESTION # 99
When antenna gain is reported in dBi, the gain of the antenna is compared to what theoretical radiator?

Answer: C

Explanation:
An isotropic radiator is a theoretical point source of electromagnetic radiation that radiates equally in all directions. It has no physical dimensions and no preferred direction of radiation. It is used as a reference for antenna gain because it represents the ideal case of a perfect omnidirectional antenna12 Antenna gain is a measure of how well an antenna concentrates its radiated power in a certain direction. It is expressed in decibels (dB) relative to a reference antenna. Whenthe reference antenna is an isotropic radiator, the antenna gain is denoted by dBi, which stands for decibels relative to isotropic12 For example, an antenna with a gain of 3 dBi means that it radiates 3 dB more power in its main direction than an isotropic radiator would. Conversely, an antenna with a gain of -3 dBi means that it radiates 3 dB less power in its main direction than an isotropic radiator would12


NEW QUESTION # 100
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