The Diameter networking protocol supports Authentication, Authorization, and Accounting with Secure Transport (AAAS) management for users and equipment. One of the Internet Engineering Task Force (IETF) standards, Diameter Base protocol implements a peer-to-peer architecture where a host acts either as a client or a server depending on its deployment within the network.
The Diameter protocol defines Diameter messages that send commands or deliver notifications to other Diameter-enabled devices.
The Policy Management system uses Diameter interfaces (for example, Gx and Rx) to connect to many of its components and with components outside of the system. See Figure 1 for the Diameter-specific interfaces.
See Policy and Protocol Specifications for a list of supported IETF Diameter specifications.