This illustration offers an overview of the OracleAS TopLink three-tier architecture with the addition of session beans as a wrapper for the persistent objects.

The illustration depicts on one hand the interaction between client applications and the application server, composed of the OracleAS TopLink, application and presentation layers (with the addition of session beans as a wrapper for the persistent objects between the application and presentation layers) and simultaneously, the interaction between the application server (which includes OracleAS TopLink) and a database.