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Multiple Choice Quiz
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1
Which of the following is not a common type of media used in data communication?
A)wire cable
B)radio
C)wave guide
D)coaxial cable
2
If a binary signal were applied directly to a telephone network
A)it would pass undistorted
B)it would pass with much distortion
C)it would not pass
D)it would be converted to analog and then pass undistorted
3
Which of the following is not a widely used modem type?
A)digital subscriber line
B)cable TV modems
C)conventional digital network
D)wireless modems
4
Which of the following is not a main type of modulation used in modern modems?
A)frequency-shift keying
B)phase-shift keying
C)frequency modulation
D)quadrature amplitude modulation
5
Constellation diagrams are widely used with which of the following modulation types?
A)frequency-shift keying
B)frequency modulation
C)amplitude modulation
D)phase-amplitude modulation
6
The measure of how fast data can be transmitted in a given bandwidth is referred to as
A)spatial efficacy
B)maximum power transfer
C)spectral efficiency
D)data bandwidth factor
7
The ratio of the average signal power of the carrier plus the sidebands to the noise power is called the
A)signal-to-noise ratio
B)carrier-to-noise ratio
C)sideband-to-noise ratio
D)average noise ratio
8
A modulation and multiplexing technique that distributes a signal and its sidebands over a very wide bandwidth is called
A)spread spectrum
B)spectral technique
C)moduplexing
D)spatial distribution
9
Any technique that is used for multiplexing many signals on a single communication channel is referred to as
A)multi-tasking
B)multiple applications
C)multiple access
D)multiple multiplexing
10
The circuitry used to translate a baseband signal to a higher transmission frequency that is better suited to the transmission medium is a
A)demultiplexer
B)translator
C)modem
D)baseband transfer circuit





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