Relationship between "discover" and "hotplug"

[Christian Convey <cconvey@cox.net>]

Hey guys,

I'm using Sarge with a 2.6.9-1 kernel. Can anyone help me understand the 
relationship between "discover" and "hotplug" in my system?

The reason I'm confused is that both seem to be involved in making the 
system aware of connected hardware, but I'm not sure how they fit 
together in 2.6/Sarge.

Thanks,
Christian