Data Communications and Networking: Signal Transmission Quiz
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Questions and Answers

What are the characteristics of an analog signal?

  • Amplitude, bit string, and phase
  • Amplitude, frequency, and phase (correct)
  • Amplitude, frequency, and modulation
  • Bit string, frequency, and phase

    • Which type of digital-to-analog conversion uses only the amplitudes of the signal to represent 0s and 1s?

  • Frequency Shift Keying
  • Amplitude Shift Keying (correct)
  • Modulation Shift Keying
  • Phase Shift Keying

    • In Amplitude Shift Keying, what happens to the frequency as the binary data changes?

  • The frequency increases with binary 1 and decreases with binary 0
  • The frequency is not relevant in ASK
  • The frequency remains the same (correct)
  • The frequency varies between 0 to 4000 Hz

    • What remains unchanged in Phase Shift Keying when representing binary 0s and 1s?

    <p>Amplitude and frequency</p> Signup and view all the answers

    What does Phase Shift Keying change to represent binary 1?

    <p>Only the phase</p> Signup and view all the answers

    What is characterized by its amplitude, frequency, and phase in data communications and networking signal transmission?

    <p>An analog signal</p> Signup and view all the answers

    In frequency shift keying, what is varied to represent binary 1 and binary 0?

    <p>Frequency of the carrier signal</p> Signup and view all the answers

    What is the basic idea behind pulse-code modulation (PCM)?

    <p>To represent an analog signal into digital bits</p> Signup and view all the answers

    What does bit rate measure in a communication channel?

    <p>Number of data bits transmitted per second</p> Signup and view all the answers

    What does baud rate refer to in a communications channel?

    <p>Number of signal changes per second</p> Signup and view all the answers

    How many bits does an analog signal carry in each signal unit if 1000 signal units are sent per second?

    <p>4 bits</p> Signup and view all the answers

    In frequency shift keying, what denotes binary 1 and binary 0?

    <p>Frequency f1 and f2 of the carrier signal</p> Signup and view all the answers

    'A baud rate is the number of times a signal in a communications channel changes state or varies.' - this statement relates to which concept?

    <p>Baud Rate &amp; Bit Rate</p> Signup and view all the answers

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