Computer Networking
Which of the following might be used by a company to satisfy its growing communications needs?

multiplexer
All of these
concentrator
controller
front-end processor

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Computer Networking
MAC is

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

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