1. A system for use in a network that provides streaming media in a plurality of media sessions between a media source and a corresponding plurality of client devices, the system comprising: a policy repository configured to store a plurality of media-centric policies; a media policy decision point, coupled to the network and the policy repository, configured to: receive media session data corresponding to one of the plurality of media sessions; determine a plurality of media-specific and non-media-specific attributes, based on the media session data; and evaluate a plurality of media-centric policies to determine a proper subset of the plurality of media-centric policies that apply to the one of the plurality of media sessions.