Computer Networking
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?

Modem
Interface
Attenuation
None of these
Teleprocessor

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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?

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

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Computer Networking
A T-switch is used to

None of these
rearrange the connections between computing equipment
echo every character that is received
transmit characters one at a time
control how messages are passed between computers

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