Computer Networking
CSMA (Carrier Sense Multiple Access) is

a very common bit-oriented data link protocol issued by ISO.
None of these
network access standard for connecting stations to a circuit-switched network
a method of determining which device has access to the transmission medium at any time
a method access control technique for multiple-access transmission media.

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Computer Networking
Baseband is

All of these
None of these
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

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Computer Networking
Modulation is the process of

converting analog signals to digital signals
Multiplexing various signals into high speed line signals
performing data encryption.
converting digital signals to analog signals

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Computer Networking
What is split horizon?

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 holds the regular updates from broadcasting to a downed link.
It prevents regular update messages from reinstating a route that has gone down.

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