28 The SystemConfiguration framework provides access to the data used to configure a running system. The APIs provided by this framework communicate with the "configd" daemon.
30The "configd" daemon manages a "cache" reflecting the desired configuration settings as well as the current state of the system. The daemon provides a notification mechanism for user-level processes which need to be aware of changes made to the "cache" data. Lastly, the daemon loads a number of bundles(or plug-ins) which monitor low-level kernel events and, via a set of policy modules, keep this cached data up to date.
32The "configd" daemon also provides an address space/task/process which can be used by other CFRunLoop based functions which would otherwise require their own process/daemon for execution.