Computer Networking
What is route poisoning?

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

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Computer Networking
Error rate is

a check bit appended to an array of binary digits to make the sum of all the binary digits.
None of these
an error-detecting code based on a summation operation performed on the bits to be checked.
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
the ratio of the number of data units in error to the total number of data units

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Computer Networking
The application layer of a network

All of these
establishes, maintains, and terminates virtual circuits
defines the user's port into the network
consists of software being run on the computer connected to the network
None of these

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