Data Error Detection and Correction Networks
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Questions and Answers

What is the name for the noncontinuous noise that is one of the most difficult errors to detect?

  • Gaussian noise
  • White noise
  • Crosstalk
  • Impulse noise (correct)
  • Which type of noise is always present to some degree in transmission media and electronic devices?

  • Gaussian noise
  • Crosstalk
  • Impulse noise
  • White noise (correct)
  • What is the cause of increased level of white noise (Gaussian noise)?

  • Decreased data transmission
  • Decreased temperature of the medium
  • Reduced activity of the electrons in the electronic device
  • Increased activity of the electrons in the electronic device (correct)
  • Which type of noise can be electrical or electromagnetic and is an unwanted coupling between two different signal paths?

    <p>Crosstalk</p> Signup and view all the answers

    What kind of noise is dependent on the temperature of the medium?

    <p>White noise</p> Signup and view all the answers

    Which type of noise interferes with an analog signal and can be difficult to remove without affecting the original signal?

    <p>Impulse noise</p> Signup and view all the answers

    What is the result of small timing irregularities that become magnified during the transmission of digital signals?

    <p>Jitter</p> Signup and view all the answers

    What is the continuous loss of a signal's strength as it travels through a medium?

    <p>Attenuation</p> Signup and view all the answers

    What is a burst error in data transmission?

    <p>Two or more bits in the data unit have changed</p> Signup and view all the answers

    What is the central concept in detecting or correcting errors in data transmission?

    <p>Redundancy</p> Signup and view all the answers

    In which layer can error detection be performed in data transmission?

    <p>Data link layer</p> Signup and view all the answers

    What method of error detection involves adding redundant bits called parity bits to each character?

    <p>Parity check</p> Signup and view all the answers

    What does a parity check involve for ASCII characters encoding?

    <p>Using 7 bits for character encoding</p> Signup and view all the answers

    Which type of noise interferes with an analog signal and can be difficult to remove without affecting the original signal?

    <p>Crosstalk noise</p> Signup and view all the answers

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