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?

Paperless office
Electronic newspaper
Electronic mail
None of these
Global network

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Computer Networking
Synchronous protocols

allow faster transmission than asynchronous protocols do
transmit characters one at a time
are more reliable
None of these
are generally used by personal computers

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