In DSC V4, the ID of the specific DSC configuration applied to a given node uniquely represented the actual configuration and node that it was run on. In DSC V5, this has been separated into a configuration name and agent ID. The configuration name identifies the configuration on a target node, and the agent ID uniquely identifies a node.

This allows you to track both the configuration and node status independently and in relation to the other, giving a holistic picture of the coverage deployment of the whole environment.