Computer Networking
What is a stub network?

A network with more than one exit and entry point.
A network that has only one entry and exit point.
A network with more than one exit point.
A network with only one entry and no exit point.

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

All of these
the interface between the X.25 network and packet mode device
None of these
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

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