Computer Networking
The data-link layer, in reference to the OSI model, specifies

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

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Computer Networking
You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

You copied the configuration into flash memory instead.
The IOS became corrupted after the copy command was initiated.
You copied the wrong configuration into RAM.
The copy did not override the shutdown command in running-config.

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