A J2EE server provides system level support services such us security, transaction management, JNDI lookups, remote access etc. J2EE architecture provides configurable and nonconfigurable services. The configurable service enables the J2EE components within the same J2EE application to behave differently based on where they are deployed. For example the security settings can be different for the same J2EE application in two different production environments. The non-configurable services include enterprise bean (EJB) and servlet life cycle management, resource pooling etc.
