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  • Question
  • An internetworking protocol that provides virtual circuit service across multiple X.25 protocol, is


  • Options
  • A. X.75
  • B. X.25
  • C. X.400
  • D. X.21
  • E. None of the above

  • Correct Answer
  • X.75 


  • Networking problems


    Search Results


    • 1. Which transmission mode is used for data communication along telephone lines?

    • Options
    • A. Parallel
    • B. Serial
    • C. Synchronous
    • D. Asynchronous
    • E. None of the above
    • Discuss
    • 2. ASK, PSK, FSK, and QAM are examples of _____ encoding.

    • Options
    • A. digital-to-digital
    • B. digital-to-analog
    • C. analog-to-analog
    • D. analog-to-digital
    • Discuss
    • 3. Which of the following digits are known as the terminal number of the Network User Address (NUA)?

    • Options
    • A. 5-7
    • B. 1-4
    • C. 8-12
    • D. 13-14
    • E. None of the above
    • Discuss
    • 4. Which of the following communications modes support two-way traffic but in only one direction of a time?

    • Options
    • A. simplex
    • B. half-duplex
    • C. three-quarters duplex
    • D. full-of the above
    • E. None of the above
    • Discuss
    • 5. A smart modem can dial, hang up and answer incoming calls automatically. Can you tell who provides the appropriate instruction to the modem for this purpose?

    • Options
    • A. Communications software
    • B. Error detecting protocols
    • C. Link access procedure (LAP)
    • D. Telecommunications
    • E. None of the above
    • Discuss
    • 6. In communication satellite, multiple repeaters are known as

    • Options
    • A. detector
    • B. modulator
    • C. stations
    • D. transponders
    • E. None of the above
    • Discuss
    • 7. Which of the following TCP/IP protocol is used for remote terminal connection service?

    • Options
    • A. TELNET
    • B. FTP
    • C. RARP
    • D. UDP
    • E. None of the above
    • Discuss
    • 8. Which of the following statements is correct?

    • Options
    • A. characteristic of the hub architecture of ARC-net is alternative routing.
    • B. characteristic of LAN is unlimited expansion
    • C. characteristic of LAN is low cost access for low bandwidth channels
    • D. characteristic of the hub architecture of ARC-net is directionalized transmission
    • E. None of the above
    • Discuss
    • 9. Which utility is an all-purpose tool for troubleshooting TCP/IP problems?

    • Options
    • A. NBTSTAT
    • B. Netstat
    • C. PING
    • D. Hostname
    • E. None of the above
    • Discuss
    • 10. The frequency range : 300 kHz to 3 MHz is used for

    • Options
    • A. AM radio transmission
    • B. FM radio transmission
    • C. TV transmission
    • D. microwave communications, satellite and radar
    • E. None of the above
    • Discuss


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