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

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

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Computer Networking
Carrier is

a collection of interconnected functional units that provides a data communications service among stations attached to the network
One or more conductors that serve as a common connection for a related group of devices
None of these
the condition when two or more sections attempt to use the same channel at the same time
a continuous frequency capable of being modulated or impressed with a second signal

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Computer Networking
Terminals are required for

None of these
realtime, distributed processing, and manager inquiry
realtime, timesharing, and message switching
realtime, timesharing, and distributed processing
realtime, batch processing, and timesharing

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