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?

Electronic newspaper
None of these
Paperless office
Electronic mail
Global network

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Computer Networking
MAC is

a very common bit-oriented data link protocol issued to ISO.
a method access control technique or multiple-access transmission media
a method of determining which device has access to the transmission medium at any time
None of these
network access standard for connecting stations to a circuit-switched network

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