Computer Networking
Baseband is

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

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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.
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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