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  1. Distributed Queue Dual Bus is a standard for

  2. A.

     LAN

    B.

     MAN

    C.

     WAN

    D.

     Wireless LAN

    E.

     LAN and MAN

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  3. A teleprocessing system may consist of

  4. A.

     user systems

    B.

     communications systems

    C.

     computer center systems

    D.

     All of the above

    E.

     None of the above

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  5. If the ASCII character G is sent and the character D is received, what type of error is this?

  6. A.

     single-bit

    B.

     multiple-bit

    C.

     burst

    D.

     recoverable

    E.

     None of the above

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  7. Which layer of OSI determines the interface of the system with the user?

  8. A.

     Network

    B.

     Application

    C.

     Data-link

    D.

     Session

    E.

     None of the above

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  9. The transfer of data from a CPU to peripheral devices of a computer is achieved through

  10. A.

     modems

    B.

     computer ports

    C.

     interfaces

    D.

     buffer memory

    E.

     None of the above

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  11. What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

  12. A.

     4

    B.

     2

    C.

     6

    D.

     3

    E.

     None of the above

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  13. Many data communication networks have been established which provide a wealth of on-demand information services to people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to select what they want?

  14. A.

     Teletex system

    B.

     Fax system

    C.

     Videotex system

    D.

     Microwave system

    E.

     None of the above

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  15. Which of the following statements is correct?

  16. A.

     Terminal section of a synchronous modem contains the scrambler

    B.

     Receiver section of a synchronous modem contains the scrambler

    C.

     Transmission section of a synchronous modem contains the scrambler

    D.

     Control section of a synchronous modem contains the scrambler

    E.

     None of the above

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  17. Which of the following characteristic(s) is/are suited to the PSS applications?

  18. A.

     bursty traffic and low communications intensity

    B.

     widely dispersed terminals and access to international packets switched services

    C.

     Multiple remote host or applications accessed by a single local access circuit terminal and circuit

    D.

     All of the above

    E.

     None of the above

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  19. Because the configuration infor-mation for a DHCP client is received dynamically, you must use which utility to read the current configuration to verify the settings?

  20. A.

     PING

    B.

     TRACERT

    C.

     ARP

    D.

     IPCONFIG

    E.

     None of the above

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