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CBSE Class 12 Computer Science Question 1 of 186

Computer Networks - II — Question 1

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Question 1

Assertion. A modem is a communication device that works on the principle of converting digital data to analog data and vice versa.

Reason. Modulation is a process of converting digital data to analog form and Demodulation is a process of converting analog data to digital form.

Answer

(a)

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Explanation
Modem is a communication device that works on the process of modulation/demodulation. In modulation, digital data of the sender computer is converted in analog form to travel over the telephone lines to the target computer. In demodulation, received analog data is converted back to digital form for the target computer.