Computer Networking
Two connected routers are configured with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?

The updated information will replace the existing routing table entry.
They will all load-balance.
The updated information will be added to the existing routing table.
The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence.
The update will be ignored and no further action will occur.

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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 splits the traffic when you have a large bus (horizon) physical network.
It holds the regular updates from broadcasting to a downed link.

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