Computer Networking
What is the main purpose of a data link content monitor?

to determine the type of switching used in a data link.
to determine the type of transmission used in a data link
to determine the flow of data
None of these
to detect problems in protocols

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Computer Networking
The network layer, in reference to the OSI model, provide

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

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Computer Networking
MAC is

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

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