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

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Computer Networking
The physical layer, in reference to the OSI model, defines

the interface between the X.25 network and packet mode device
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received
None of these
All of these

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