Computer Networking
Demodulation is the process of

dividing the high-speed signals into frequency bands
converting analog signals to digital signals
converting digital signals to analog signals
combining many low speed channels into one high speed channel
None of these

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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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?

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

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