Computer Networking
What is split horizon?

It prevents regular update messages from reinstating a route that has gone down.
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 splits the traffic when you have a large bus (horizon) physical network.

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Computer Networking
Bandlimited signal is

None of these
simultaneous transmission of data to a number of stations
a signal all of whose energy is contained within a finite frequency range
All of these
transmission of signals without modulation

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