Control points and their purpose

Hi people,

New to the list and i'd like to ask a general question.

Control points. What exactly do they do ? are they some sort of
program that runs in the background listening to the network for new
devices? How does it detect a new device. Is this done by the device
(for example a network camera) once it is plugged into the network?

Im just a bit confused as to the discovery. Who initiates it? how?

Thanks for any feedback,
Daragh


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