Computer Networking
Parity bit is

a check bit appended to an array of binary digits to make the sum of all the binary digits.
an error-detecting code based on a summation operation performed on the bits to be checked.
None of these
the ratio of the number of data units in error to the total number of data units
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

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Computer Networking
What is split horizon?

It prevents regular update messages from reinstating a route that has gone down.
Information about a route should not be sent back in the direction from which the original update came.
It holds the regular updates from broadcasting to a downed link.
It splits the traffic when you have a large bus (horizon) physical network.

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Computer Networking
You need to configure a router for a Frame Relay connection to a non-Cisco router. Which of the following commands will prepare the WAN interface of the router for this connection?

Router(config-if)# encapsulation frame-relay cisco
Router(config-if)# encapsulation frame-relay ansi
Router(config-if)# encapsulation frame-relay ietf
Router(config-if)# encapsulation frame-relay q933a

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