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Diameter Protocol

Bethany Hill
Sep 8, 2020 2:00:00 PM

The diameter protocol is an application layer protocol that provides authorization, authentication and accounting (AAA) services to computer networks and network applications.

The diameter protocol is an extensible protocol upon which custom protocols can be defined to provide new network services. Different diameter protocol interfaces are used in telecommunication networks, most commonly in IP based mobile networks such as LTE, to control and coordinate network infrastructure usage by users. The diameter protocol interfaces initiate and maintain user network access sessions, enforce usage policies, quality of service, metering and billing policies. They also provide other functionalities that telecommunication service providers employ to configure, monitor and manage their networks. The protocol's predecessor widely used to provide AAA network services is called RADIUS (Remote Authentication Dial-In User Service). Improvements provided by the diameter base in comparison to RADIUS include the use of TCP for reliable communication as opposed to UDP which is used by the RADIUS protocol.

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