cisco certification of completion

cisco certification of completion.Reliability of protocol message transport: Diameter uses TCP or STCP as the transport layer protocol.Support for proxy functions: Diameter defines various proxy functions, such as proxy, relay, redirect, and translation agent (proxy, relay, redirectandtranslationagent) 0Protocol messages initiated by the server (server initiated messages): Diameter forces the server to initiate protocol messages. In this way, functions such as re-authentication and re-authorization can be performed on demand. Support for transition mechanisms: Diameter maintains compatibility with RADIUS-enabled systems.Capability negotiation: Diameter supports capability negotiation features such as error handling and mandatory and non-mandatory attribute/value pairs (Attribute/ValuePair, AVP) OPeer discovery: Diameter supports dynamic discovery of peers with the help of DNS.The main reason for inventing the Diameter protocol was to be able to work with applications that had protocol extensions enabled. The primary Diameter application is called the Diameter base application, which implements the core of the Diameter protocol. Other Diameter applications include mobile IPv4 applications, network access server applications, DiameterCredit-ControlApplication, and others. Each of these applications specifies the content of the information exchanged in Diameter protocol messages. For example, to use Diameter as the AAA protocol for controlling access to the network, the Diameter peer has to enable both the Diameter Base application and the Diameter Network Access Server application.The Application ID field value in the header of the Diameter protocol message specifies the ID of the Diameter applicationO Each Diamete application (including Diameter base applications) is identified with a command code that identifies the specific application action (application action)oDiameter is a peer-to-peer protocol. The entities (entityinaDiametercontext) that participate in the Diameter protocol are called Diameter nodes. Diameter nodes can be thought of as hosts that implement the Diameter protocol.The Diameter protocol is based on two main protocol messages: the REQUEST message (R position 1 in the protocol message header) and the ANSWER (R position 0 in the protocol message header). Each Diameter protocol message carries a series of attribute/value pairs (AVPs), which contain Diameter application-specific information.In the basic exchange of Diameter protocol messages, once a transport layer connection is established, the Diameter initiator sends a Capability-Exchange-Request (CER) message to its peer, who sends a Capability-Exchange-Answer (CEA) message. Answer (CEA) message in response. The CER message may contain multiple AVPs,