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Configuring Client-Server Communications
Restriction: This topic applies only when the Enterprise Server feature is enabled.
A communications process is the component of an enterprise server instance that handles communications between clients and the enterprise server instance. It contains a number of service listeners. An enterprise server instance is created with one communications process, but you can add more.
A service listener 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.