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Questions and Answers
What is data communication?
What is data communication?
- The transfer of data only in the form of a digital bitstream over a communication channel
- The transfer and reception of data in the form of an electromagnetic signal
- The transfer and reception of data in the form of a digital bitstream or a digitized analog signal over a communication channel (correct)
- The reception of data only in the form of a digitized analog signal over a communication channel
What is analog transmission?
What is analog transmission?
- A method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable (correct)
- A method of conveying digital information using a continuous signal
- A method of conveying data using a discontinuous signal
- A method of conveying only voice information using a continuous signal
How are messages represented in passband transmission?
How are messages represented in passband transmission?
- By a limited set of continuously varying waveforms using a digital modulation method (correct)
- By a limited set of continuously varying waveforms using an analog modulation method
- By a sequence of pulses using a line code
- By a single continuously varying waveform using a digital modulation method
Which channels can be used for data communication?
Which channels can be used for data communication?
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What is the data represented as in data communication?
What is the data represented as in data communication?
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