CWNA Chapter 12

25 Questions

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CWNA Quizzes & Trivia

Questions and Answers
  • 1. 
    What is the time it takes to deliver VoIP packet from the source device to the destination device?
    • A. 

      Jitter

    • B. 

      Latency

    • C. 

      Throughput

    • D. 

      Overhead

  • 2. 
    What type of interference has the capability to disrupt the communications of an entire frequency band?
    • A. 

      All-band interference

    • B. 

      Narrowband interference

    • C. 

      Wideband interference

    • D. 

      RF interference

  • 3. 
    What form of interference is typically associated with FHSS communications?
    • A. 

      Wideband

    • B. 

      Narrow band

    • C. 

      RF

    • D. 

      All-band

  • 4. 
    What term do Wi-Fi vendors use to explain degrading performance due to overlapping frequency space?
    • A. 

      Wideband

    • B. 

      Narrowband

    • C. 

      All-band

    • D. 

      Adjacent Channel

  • 5. 
    What can cause Layer 2 retransmissions and is often overlooked?
    • A. 

      Mismatched Power Settings

    • B. 

      Low SNR

    • C. 

      Adjacent Channel Interference

    • D. 

      Wideband Interference

  • 6. 
    What problem occurs when one client station's transmissions are heard by the access point but not by any of the other client stations in the BSS?
    • A. 

      Low SNR

    • B. 

      Near/Far

    • C. 

      Hidden Node

    • D. 

      Latency

  • 7. 
    What can cause hidden node problem?
    • A. 

      Physical obstructions and poor WLAN design

    • B. 

      Other signals interferring

    • C. 

      Mismatched power settings

    • D. 

      Low SNR

  • 8. 
    Which of these is NOT a way to fix a hidden node problem?
    • A. 

      Remove any obstacles

    • B. 

      Add another access point

    • C. 

      Use RTS/CTS to diagnose

    • D. 

      Redesign the entire WLAN

  • 9. 
    What causes client station radios to shift down to lower bandwidth as it moves away from an access point?
    • A. 

      Roaming

    • B. 

      Dynamic Rate Switching

    • C. 

      Jitter

    • D. 

      Hidden Node

  • 10. 
    What is the method by which client stations move between RF coverage cells in a seamless manner?
    • A. 

      Dynamic Rate Switching

    • B. 

      Jitter

    • C. 

      Roaming

    • D. 

      Co-Channel Interference

  • 11. 
    What part of WLAN makes the decision on whether or not to roam between access points?
    • A. 

      Access Point

    • B. 

      Client Stations

    • C. 

      ESS

    • D. 

      Administrator

  • 12. 
    Which of these can cause a roaming problem?
    • A. 

      Too little or too much duplicate cell coverage

    • B. 

      Hidden node

    • C. 

      Free space path loss

    • D. 

      CSMA/CA

  • 13. 
    As defined by the 802.11k amendment, what is used to enhance roaming performance?
    • A. 

      Receive Signal Strength Indicator

    • B. 

      Airtime Fairness

    • C. 

      Radio Resource Measurement

    • D. 

      Duplicate Coverage

  • 14. 
    What usually determines the rules of when a client station decides to roam?
    • A. 

      Receive signal strength indicator

    • B. 

      Airtime Fairness

    • C. 

      CSMA/CA

    • D. 

      Radio Resource Measurement

  • 15. 
    What is a common mistake made by many businesses when first deploying a WLAN?
    • A. 

      Improper design

    • B. 

      Misconfiguration

    • C. 

      Configuring multiple access points on the same channel

    • D. 

      Using the wrong protocol

  • 16. 
    What interference occurs because all the Access Points are on the same channel called?
    • A. 

      Wide Band

    • B. 

      Co-Channel

    • C. 

      All-Band

    • D. 

      Adjacent Channel

  • 17. 
    Channel Reuse Design is used to avoid or prevent what kinds of interference?
    • A. 

      Wide Band and All-Band

    • B. 

      Narrowband and Wide band

    • C. 

      Adjacent Channel and Co-Channel

    • D. 

      Adjacent Channel and All-band

  • 18. 
    Different regions such as Europe use a different form of channel reuse pattern, what is it?
    • A. 

      5 channel

    • B. 

      4 channel

    • C. 

      2 channel

    • D. 

      3 channel

  • 19. 
    What is the most traditional channel pattern in the United States and Canada?
    • A. 

      3 channel

    • B. 

      4 channel

    • C. 

      5 channel

    • D. 

      2 channel

  • 20. 
    In the 5GHz frequency bands there are 24 channels that may be used in a channel reuse pattern, but only how many are available for reuse in the United States?
    • A. 

      23

    • B. 

      15

    • C. 

      21

    • D. 

      20

  • 21. 
    What is an alternative WLAN channel design that has multiple access points all on the same channel and with the same BSSID?
    • A. 

      Multiple Channel Architecture

    • B. 

      Single-Channel Architecture

    • C. 

      Four channel Plan

    • D. 

      Three Channel Plan

  • 22. 
    What is each layer of multiple APs on a single channel using the same BSSID known as?
    • A. 

      Channel Stacking

    • B. 

      Zero Hand-off

    • C. 

      Channel Blanket

    • D. 

      Single Channel Architecture

  • 23. 
    What mistake is often made when deploying access points?
    • A. 

      Transmitting at full power

    • B. 

      Mismatched power settings

    • C. 

      Hidden node

    • D. 

      Improper Channel reuse

  • 24. 
    What can Oversized Coverage Cells cause?
    • A. 

      Hidden node problem

    • B. 

      RF interference

    • C. 

      Mismatched Power Settings

    • D. 

      Low SNR

  • 25. 
    What problems do lightning present to WLAN?
    • A. 

      Antenna shifting

    • B. 

      Damage to equipment

    • C. 

      Damage to cables

    • D. 

      Refraction of signal