Computer Networking
ASK, PSK, FSK, and QAM are examples of _____ encoding.

digital-to-digital
analog-to-analog
analog-to-digital
None of these
digital-to-analog

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

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

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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