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

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
Terminals are used to

provide information for the manager
None of these
collect data from the physical system
All of these
communicate management decisions to the physical system

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