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CWNP CWNA-109 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: IEEE 802.11 Network Operations15%- Performance Optimization
  • 1. Channel management
  • 2. QoS (WMM)
  • 3. Roaming (802.11r/k/v)
- Troubleshooting
  • 1. Common connectivity issues
  • 2. Spectrum analysis
  • 3. Protocol analysis
Topic 2: IEEE 802.11 Network Implementation20%- Power over Ethernet (PoE)
  • 1. 802.3af, 802.3at, 802.3bt
- Site Survey and Design
  • 1. Active site surveys
  • 2. AP placement and density
  • 3. Predictive and Passive site surveys
- Deployment Models
  • 1. Distributed and Centralized architectures
  • 2. Autonomous APs
  • 3. Cloud-based and Controller-based
Topic 3: IEEE 802.11 Protocols and Devices20%- 802.11 Frame Types
  • 1. Management, Control, and Data frames
  • 2. Frame exchange processes
- CSMA/CA
  • 1. DCF and EDCA
  • 2. RTS/CTS
- WLAN Architecture
  • 1. Stations (STA), Access Points (AP)
  • 2. Extended Service Set (ESS)
  • 3. Basic Service Set (BSS)
  • 4. Independent Basic Service Set (IBSS)
  • 5. Distribution System (DS)
Topic 4: Radio Frequency (RF) Technologies15%- RF Fundamentals
  • 1. Signal strength and loss (attenuation)
  • 2. Wavelength, frequency, and amplitude
  • 3. RF behaviors: absorption, reflection, refraction, diffraction, scattering
- Antenna Concepts
  • 1. Antenna types and usage
  • 2. Antenna gain and patterns
  • 3. Polarization
- RF Mathematics
  • 1. Link budget calculations
  • 2. Inverse Square Law
  • 3. dB, dBi, dBd, dBm
Topic 5: IEEE 802.11 Network Security15%- Encryption and Authentication
  • 1. CCMP, GCMP
  • 2. OWE and SAE
  • 3. 802.1X/EAP
- Security Basics
  • 1. WPA2 and WPA3
  • 2. Legacy security (WEP, WPA)
  • 3. Authentication and Association
Topic 6: IEEE 802.11 Regulations and Standards15%- IEEE 802.11 Standards
  • 1. 802.11be (Wi-Fi 7) overview
  • 2. 802.11-2020 and amendments (a/b/g/n/ac/ax)
  • 3. Channel bonding and widths
- Regulatory Bodies and Domains
  • 1. FCC, ETSI, IC, and others
  • 2. Frequency bands and channels

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CWNP Wireless Network Administrator (CWNA) CWNA-109 Prüfungsfragen mit Lösungen (Q107-Q112):

107. Frage
When implementing PoE, what role is played by a switch?

Antwort: A

Begründung:
PoE stands for Power over Ethernet, which is a technology that allows network devices to receive power and data over the same Ethernet cable. PoE eliminates the need for separate power adapters or outlets for devices such as IP phones, cameras, or APs. PoE requires two types of devices: PSE (Power Sourcing Equipment) and PD (Powered Device). A PSE is a device that provides power to the Ethernet cable, such as a switch, injector, or splitter. A PD is a device that receives power from the Ethernet cable, such as an IP phone, camera, or AP. When implementing PoE, a switch plays the role of a PSE.


108. Frage
A string of characters and digits is entered into an AP and a client STA for WPA2 security. The string is 8 characters long. What is this string called?

Antwort: B

Begründung:
The string of characters and digits that is entered into an AP and a client STA for WPA2 security and is 8 characters long is called a passphrase. A passphrase is a human-readable text that is used to generate a Pre-Shared Key (PSK) for WPA2-Personal security. A passphrase can be between 8 and 63 characters long and can include any ASCII character. The PSK is a 256-bit key that is derived from the passphrase using a hashing algorithm called PBKDF2. The PSK is used to encrypt and decrypt the data frames between the AP and the client STA. A MSK is a Master Session Key that is generated by an authentication server for WPA2-Enterprise security. A WEP key is a 40-bit or 104-bit key that is used for Wired Equivalent Privacy (WEP) security, which is deprecated and insecure. A PSK is not a string of characters and digits, but a binary key. References: [CWNP Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 303; [CWNA: Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page
293.


109. Frage
What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?

Antwort: D

Begründung:
TVHT stands for Television Very High Throughput and it is a PHY defined by the 802.11af amendment. It uses the TV white space (TVWS) spectrum in the VHF and UHF bands between 54 and 790 MHz, which are not in use by broadcast video signals at the time. It can provide long-range and low-power connectivity for WLAN devices.


110. Frage
What type of antenna is commonly used indoors, provides an omnidirectional horizontal radiation pattern, and is often mounted on a wall or built into an access point?

Antwort: B

Begründung:
A dipole antenna is a common omnidirectional antenna used in indoor WLAN deployments. It radiates RF energy in a 360-degree horizontal pattern, resembling a donut shape when viewed from the side, with nulls directly above and below the antenna. Dipole antennas are frequently built into access points or mounted externally, and are well-suited for environments where coverage is needed in all directions around the antenna, such as open office spaces.


111. Frage
What is the purpose of an RF connector's impedance rating, and what is the standard impedance used in 802.11 WLAN systems?

Antwort: A

Begründung:
Impedance is a measure of the opposition to current flow in an RF circuit, and it is critical that all components in an RF system, including cables, connectors, and antennas, share the same impedance rating. In 802.11 WLAN systems, the standard impedance is 50 ohms. When impedance is mismatched between components, some of the signal is reflected back toward the source instead of being radiated by the antenna, resulting in signal loss and reduced performance, a condition measured using Voltage Standing Wave Ratio (VSWR).


112. Frage
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