CWNA-109対応問題集 & CWNA-109問題例

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CWNP CWNA-109 Exam Syllabus Topics:

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

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CWNP Wireless Network Administrator (CWNA) 認定 CWNA-109 試験問題 (Q68-Q73):

質問 # 68
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?

正解：D

解説：
DHCP (Dynamic Host Configuration Protocol) is a commonly used method to locate the controllers by the APs in a WLAN that is implemented using wireless controllers. DHCP is a protocol that allows a device to obtain an IP address and other network configuration parameters from a server. In a wireless controller scenario, the APs can use DHCP to request an IP address from a DHCP server, which can also provide the IP address or hostname of the wireless controller as an option in the DHCP response. This way, the APs can discover the wireless controller and establish a connection with it. Alternatively, the APs can also use other methods to locate the wireless controller, such as DNS (Domain Name System), broadcast or multicast discovery, or manual configuration.


質問 # 69
What terms accurately complete the following sentence?
The IEEE 802.11-2016 standard specifies mandatory support of the _______________ cipher suite for Robust Security Network Associations, and optional use of the ________________ cipher suite, which is designed for use with pre-RSNA hardware and is deprecated.

正解：A


質問 # 70
What is appended to the end of each 802.11 data frame after the payload?

正解：C

解説：
The FCS (Frame Check Sequence) is appended to the end of each 802.11 data frame after the payload. The FCS is a 4-byte field that contains a CRC-32 (Cyclic Redundancy Check) value that is calculated based on the contents of the MAC header and the payload of the frame. The FCS is used by the receiver to verify the integrity of the frame and to detect any errors or corruption that may have occurred during transmission. If the FCS does not match with the expected value, the frame is discarded by the receiver.


質問 # 71
What feature was introduced in the 802.11h amendment in order to uphold regulatory requirements for 5 GHz operations.

正解：C


質問 # 72
In an 802.11n (H T) 2.4 GHz BSS, what prevents each station from using all the airtime when other client stations are actively communicating in the same BSS?

正解：C

解説：
Explanation:What prevents each station from using all the airtime when other client stations are actively communicating in the same BSS is CSMA/C A . CSMA/CA stands for Carrier Sense Multiple Access with Collision Avoidance and is a media access control method used by WLAN devices to share the wireless medium. CSMA/CA works by having each station sense the medium before transmitting a frame. If the medium is busy (i.e., another station is transmitting), the station defers its transmission until the medium is idle. If the medium is idle, the station waits for a random backoff period before transmitting. This way, CSMA/CA reduces the chances of collisions and ensures fair access to the medium for all stations. CSMA/CA also uses positive acknowledgements to confirm successful transmissions and retransmissions to recover from errors. CSMA/CD, DOS prevention, and OFDMA are not used by WLAN devices in a BSS.


質問 # 73
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