Diameter (protocol)

Diameter is a protocol used in telecommunications for authentication, authorization, and accounting (AAA) of users and devices. It ensures that services like phone calls and internet access are provided securely and billed correctly. Think of Diameter as a communication standard that helps networks verify users' identities, manage their access to services, and keep track of their usage. It’s an evolution of an older protocol called Radius, offering improved security and functionality to support modern demands in mobile and fixed networks. Essentially, Diameter helps service providers manage user connections efficiently and securely.