Instant Messaging contains the following core components:
Instant Messenger Resources (client). A set of files that makes up the client program for end users to initiate, compose, and reply to messages. Typically users also use the client to participate in conferences. The client is also called Sun Java System Instant Messenger.
Instant Messaging Server. An electronic message delivery system that supports instant message delivery from one system to another system. The server serves the presence information to Instant Messenger clients, enables end users to establish sessions, and enforces policies.
Instant Messaging Multiplexor. A scalability component that consolidates messenger connections. To support large deployments, with thousands of concurrent connections, Instant Messaging uses a connection multiplexor to improve server scalability. This component opens a single connection to the Instant Messaging server. In addition to scalability, you can install the multiplexor outside the firewall while leaving the server inside the firewall to protect it from unauthorized external access. The Instant Messaging multiplexor is also referred to as the multiplexor.
Access, Communication, and Transfer Protocols. These protocols, such as LDAP, HTTP, TCP/IP, and SMTP, can be found in Instant Messaging Supported Standards.
Access Manager Instant Messaging Service Definition. Instant Messaging provides a service definition to Access Manager using the Access Manager SDK, to provide support for Access Manager managed policies and SSO capabilities.