Computer Networking
What is split horizon?

It splits the traffic when you have a large bus (horizon) physical network.
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.

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Computer Networking
Synchronous protocols

allow faster transmission than asynchronous protocols do
None of these
transmit characters one at a time
are generally used by personal computers
are more reliable

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