Communication Systems Revision Set 3

10 Questions | Total Attempts: 44

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Communication Systems Revision Set 3

Aids in testing your knowledge of teleconferencing communication systems


Questions and Answers
  • 1. 
    During a telephone call over the PSTN, which of the following is TRUE?
    • A. 

      Data can travel over a variety of different routes during a conversation

    • B. 

      A single connection is maintained for the duration of the call

    • C. 

      The data is split into packets that travel independently of each other

    • D. 

      The same circuit may be shared with IP and other voice data

  • 2. 
    Which of the following terms best describes a private WAN connecting a company's various offices?
    • A. 

      Intranet

    • B. 

      Extranet

    • C. 

      Internet

    • D. 

      PSTN

  • 3. 
    The PSTN is currently used for audio in many teleconferences because:
    • A. 

      Voice quality is better on a connectionless network

    • B. 

      Currently multicasting is not widely implemented on the Internet

    • C. 

      Circuit switched networks provide higher levels of security

    • D. 

      Voice quality is better on a connection-based network

  • 4. 
    When participants are widely dispersed, which of the following is an advantage of teleconferencing systems compared to face-to-face meetings?
    • A. 

      Ability to develop personal relationships is enhanced

    • B. 

      Specialised information technology is required

    • C. 

      Significant savings in terms of money and time

    • D. 

      All of the above

  • 5. 
    Which of the following is TRUE for PSTN based audio conferences?
    • A. 

      Each participant has a different circuit

    • B. 

      Audio from each participant is transferred as a sequence of packets

    • C. 

      All participants share a single circuit

    • D. 

      Each participant must use a dedicated conference phone

  • 6. 
    The purpose of a streaming video server is:
    • A. 

      To adjust the quality of the video stream sent to each participant based on their transmission speed

    • B. 

      To transmit identical streams of video to all conference participants

    • C. 

      To ensure a continuous connection between all participants is maintained

    • D. 

      To connect and disconnect participants as they enter and leave the conference

  • 7. 
    With regard to the video received during a videoconference, which of the following is TRUE?
    • A. 

      All participants in a video conference must receive video of identical quality

    • B. 

      The quality can never exceed that of the collected video

    • C. 

      The codec used by the sender can be different to the codec used by the receivers

    • D. 

      Video quality decreases as transmission rates increase

  • 8. 
    When IP multicast is used, which of the following occurs?
    • A. 

      Each participant receives the same stream

    • B. 

      Each participant receives their own stream

    • C. 

      A dedicated streaming server is defiantly required

    • D. 

      Video cannot be sent from multiple locations

  • 9. 
    Teleconferencing can best be described as:
    • A. 

      Synchronous and simplex

    • B. 

      Asynchronous and full duplex

    • C. 

      Asynchronous and simplex

    • D. 

      Synchronous and full duplex

  • 10. 
    Which list contains devices used to collect data during teleconferences?
    • A. 

      Phone, monitor, keyboard, mouse

    • B. 

      Speakers, monitors, headsets, projectors

    • C. 

      Phone, video camera, document camera, keyboard, mouse

    • D. 

      Video camera, document camera, speakers, scanners

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