Distributed Networking is Panda3D's high level network API. When a distributed object is created all interested clients will automatically create a copy of that object. Updates to the object will automatically propagate to the copies.
The distributed network is composed of several layers: the dc file which defines the communication, ServerRepositories which handle inter client communication, ClientRepositories which interact and manage the distributed objects, and the distributed objects themselves.
The documentation on these features is still in development. Read the forums for the most up-to-date information.