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

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

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Computer Networking
TCP is:

Operates at the Data Link layer
None of these
Connection orientated and unreliable
Connection orientated and reliable
Connectionless and unreliable

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Computer Networking
X.21 is

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

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