Computer Networking
Many data communication networks have been established which provide a wealth of on-demand information services to people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to select what they want?

Fax system
Teletex system
Microwave system
Videotex system
None of these

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Computer Networking
Carrier is

a continuous frequency capable of being modulated or impressed with a second signal
None of these
the condition when two or more sections attempt to use the same channel at the same time
a collection of interconnected functional units that provides a data communications service among stations attached to the network
One or more conductors that serve as a common connection for a related group of devices

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