This section document in deeper detail how Ripple can be implemented, the current status of the project and plans for developpement.
This section refers to some fundamental concept, so you may start from the Concept section. For a general introduction refer to the section Ripple Project.
Notice that the section Server implementation documents servers that may work in a centralized way without any protocol to communicate with other servers.
The section Protocol Design documents an inter server protocol. That protocol will enable a decentralized Ripple Network or even a Peer to Peer one.