Computer Networking
Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?

Global network
Electronic mail
None of these
Electronic newspaper
Paperless office

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Computer Networking
Demodulation is the process of

combining many low speed channels into one high speed channel
converting digital signals to analog signals
converting analog signals to digital signals
None of these
dividing the high-speed signals into frequency bands

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