Computer Networking
Demodulation is the process of

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

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Computer Networking
The data-link layer, in reference to the OSI model, specifies

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

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