Computer Networking
The network address of 172.16.0.0/19 provides how many subnets and hosts?

8 subnets, 2,046 hosts each
7 subnets, 30 hosts each
7 subnets, 2,046 hosts each
8 subnets, 8,190 hosts each

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Computer Networking
What is split horizon?

Information about a route should not be sent back in the direction from which the original update came.
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.
It holds the regular updates from broadcasting to a downed link.

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