Diameter Protocol Message Structure
by Diameter protocol is basically a Request/Response kind of protocol, hence this diameter protocol follows client/server model to communicate between nodes. In Diameter protocol, for every request message there will be an answer message for sure. For basic information related to Diameter protocol read article (Diameter Protocol Basics).
A Diameter protocol packet consists of Diameter message header along with variable number of AVP’s (Attribute-Value Pairs). Diameter message data is stored in form of AVP’s in the message.