Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A physical address that is assigned by the manufacturer
A logical address that identifies the workstation
An alias for the computer name
The logical domain address for the workstation
A physical address that is randomly assigned each time the computer is started

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Computer Networking
Communication network is

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

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