Data Communication And Networking Mac 260 Final Review Test

97 Questions | Total Attempts: 44

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Data Communication And Networking Mac 260 Final Review Test

Below are a data communication and networking mac 260 final review test. It is ideal for anyone who is preparing to take up the finals on how to fix any communication issues a client may face. Do you believe you know just enough to get all the questions, right? How about you give it a try and get to see if you are actually right.


Questions and Answers
  • 1. 
    If impulse noise interferes with a digital signal, often the original digital signal cannot be recognized and recovered.
    • A. 

      True

    • B. 

      False

  • 2. 
    White noise is dependent on the temperature of the medium.
    • A. 

      True

    • B. 

      False

  • 3. 
    The CRC error-detection method treats the packet of data to be transmitted as a large polynomial.
    • A. 

      True

    • B. 

      False

  • 4. 
    An unfortunate side effect of noise during a transmission is that the transmit- ting station has to slow down its transmission rate.
    • A. 

      True

    • B. 

      False

  • 5. 
    If jitter becomes too great, correcting it can require the transmitting devices to speed up their transmission rates.
    • A. 

      True

    • B. 

      False

  • 6. 
    Returning a message was one of the first error-control techniques developed.
    • A. 

      True

    • B. 

      False

  • 7. 
     Error bursts occur ____ percent of the time.
    • A. 

      2 to 5

    • B. 

      5 to 10

    • C. 

      8 to 10

    • D. 

      10 to 20

  • 8. 
    The CRC method is almost foolproof.
    • A. 

      True

    • B. 

      False

  • 9. 
    Sliding window protocols have been around since the 1970s.
    • A. 

      True

    • B. 

      False

  • 10. 
    Because white noise is relatively continuous, it can be reduced significantly but never completely eliminated.
    • A. 

      True

    • B. 

      False

  • 11. 
    Typically, impulse noise is a(n) ____ burst of energy.
    • A. 

      Digital

    • B. 

      Analog

    • C. 

      Binary

    • D. 

      Logical

  • 12. 
    High humidity and wet weather can cause an increase in electrical ____ over a telephone system.
    • A. 

      Compression

    • B. 

      Attenuation

    • C. 

      Jitter

    • D. 

      Crosstalk

  • 13. 
    To minimize the effect of echo, a device called a(n) ____ can be attached to a line.
    • A. 

      Echo suppressor

    • B. 

      Repeater

    • C. 

      Amplifier

    • D. 

      Hub

  • 14. 
    In a stop-and-wait error control system, a receiver may acknowledge multiple packets with a single ACK.
    • A. 

      True

    • B. 

      False

  • 15. 
    ____ means that if the transmitting modem sends data and the data arrives garbled, the receiving modem may ask the transmitting modem to fall back to a slower transmission speed.
    • A. 

      Impulse negotiation

    • B. 

      Fallback negotiation

    • C. 

      Attenuation

    • D. 

      Downlink

  • 16. 
    Twisted pair Category 5e/6 cable should not be longer than the recommended 100-meter (300-foot) distance when it’s transmitting at ____ Mbps.
    • A. 

      100

    • B. 

      250

    • C. 

      500

    • D. 

      1000

  • 17. 
     ____ is the result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one device to another.
    • A. 

      White noise

    • B. 

      Jitter

    • C. 

      Attenuation

    • D. 

      Echo

  • 18. 
    Installing proper shielding on cables prevents ____.
    • A. 

      White noise

    • B. 

      Impulse noise

    • C. 

      Attenuation

    • D. 

      Crosstalk

  • 19. 
    The most basic error-detection techniques are parity checks, which are used with ____ connections.
    • A. 

      Synchronous

    • B. 

      Asynchronous

    • C. 

      Statistical

    • D. 

      Fiber-optic

  • 20. 
       ____ for error control is becoming a mode of operation for some newer wide area network transmission techniques.
    • A. 

      Returning a message

    • B. 

      Doing nothing

    • C. 

      Correcting the error

    • D. 

      Fixing the error

  • 21. 
    ____________________ is a relatively continuous type of noise and is much like the static you hear when a radio is being tuned between two stations.
  • 22. 
     ____________________ is a noncontinuous noise and one of the most difficult errors to detect, because it can occur randomly.
  • 23. 
      ____________________ is an unwanted coupling between two different signal paths.
  • 24. 
    ____________________ is the reflective feedback of a transmitted signal as the signal moves through a medium.
  • 25. 
    T A(n) ____________________ is essentially a filter that allows the signal to pass in one direction only.