What is Diameter?

Diameter is an Authentication, Authorization and Accounting (AAA) Protocol utilized by Laptop Networks. It defines the minimum necessities that an AAA protocol ought to assist and turned into built to surpass and UPDATE the older RADIUS protocol that preceded it. It happened due to various developments made to cope with the restrictions of the RADIUS Gateway.

What Does Diameter Mean?

Diameter is a base basis protocol with Routing competencies, negotiation skills, error managing and transmission of diameter messages. It serves to authenticate, authorize and account for the activities of a person before being allowed into the commUnity to use an ISP’s services.

AAA is simply a Method that Filters Records earlier than granting get right of entry to to a customer or consumer into a commuNity so as to offer a secure and reliable Output. One of the early requirements used to put in force AAA is the Remote Authentication Dial-In User Service (RADIUS) that Diameter cHanged. RADIUS changed into quite popular, however it become very restricted in security and reliability, so it become stepped Forward on by way of including superior tactics and new operations including Attribute-price pairs and errors notification. The base RADIUS gateway protocol plus the brand new delivered Functions have become the Diameter protocol, which is only a pun on RADIUS because the diameter of a circle is same to twice its radius.

The layout of Diameter became commenced by means of the 3^rd Generation Partnership Project (3GPP) for his or her IP Multimedia Subsystem (IMS). It helps Interfaces together with Dx, Dh, Cx, Ro, Rh and Sh. It was now not backwards well matched, so older programs utilising RADIUS needed to adapt to the brand new protocol.