A listener object contains a network address that accepts incoming client requests on behalf of services. A service can have multiple listeners, and a listener can accept client requests on behalf of multiple services.
You can configure a listener to use SSL (Secure Sockets Layer), a facility for secure, encrypted communication and checking online identities.
Each listener is associated with a connector. This is software that can process the type of requests the listener handles.
Enterprise Server comes with several connectors, including: