Computer Networking
What is route poisoning?

It describes when a router sets the metric for a downed link to infinity.
It is information received from a router that can't be sent back to the originating router.
It prevents regular update messages from reinstating a route that has just come up.
It sends back the protocol received from a router as a poison pill, which stops the regular updates.

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Computer Networking
RS-232-G

requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
None of these
is an interface between two data circuit terminating equipment as examplified by a local and remote modem
specifies only the mechanical characteristics of an interface by providing a 25-pin connector

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

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
All of these

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