A device that modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a ____.

A device that modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a ____.

A device that modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a ____. 



a. hub
b. modem
c. switch
d. repeater






Answer: B


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