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

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

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Computer Networking
What does a VLAN do?

Provides multiple broadcast domains within a single collision domain.
Provides multiple collision domains on one switch port.
Acts as the fastest port to all servers.
Breaks up broadcast domains in a layer 2 switch internetwork.

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