Computer Networking
Terminals are required for

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

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

the virtual circuit interface to packet-switched service
None of these
All of these
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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