Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 2, 1, 7
3, 3, 2, none
3, 3, 1, 7
3, 2, 1, none
All of these

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Computer Networking
What is split horizon?

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

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