Computer Networking
TCP is:

Operates at the Data Link layer
Connection orientated and unreliable
Connection orientated and reliable
None of these
Connectionless and unreliable

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Computer Networking
What is split horizon?

It holds the regular updates from broadcasting to a downed link.
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.

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