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The architecture of SAP ERP is based on a three-tier model: the database tier, the application tier, and the presentation tier. The database tier typically uses DB2 on z/OS systems, providing data storage and management. The application tier, which includes the SAP Application Server, handles business logic and processes user requests.
The presentation tier, primarily the SAP GUI, provides the user interface for interacting with the system. Communication between these tiers occurs through various protocols, including HTTP/HTTPS for web services and RFC for communication between SAP systems. The SAP Application Server is a key component, responsible for executing business processes and managing user sessions.
SAP Central Services handles communication and synchronization. The system supports various integration methods, including SOAP and RESTful web services. The RBAC model is used for access control, with users assigned roles that define their permissions.
Encryption is used for data transmission and storage. Compared to Oracle E-Business Suite, SAP ERP offers a more modular and flexible architecture, allowing for easier customization and integration with other systems. The use of DB2 on z/OS provides a robust and scalable database solution.
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