For AS ABAP-based SAP systems, you can use Software Update Manager to update which of...

The Software Update Manager (SUM) in AS ABAP-based SAP systems is a versatile tool used for system maintenance tasks, including upgrades, updates, and conversions. It can update the SAP kernel (A), which is the core executable component of the SAP system. The SAP kernel update is a crucial maintenance activity that ensures system stability and performance improvements. SUM can also update software components like SAP_BASIS (B), which is a foundational component that provides essential services and functionality for SAP applications. The SAP Host Agent (C) is typically updated independently of SUM through specific SAP Host Agent update procedures. The database system (D) update or upgrade is usually performed using tools and procedures specific to the database platform in use and not directly through SUM, althoughSUM can orchestrate some database update steps as part of a system update or upgrade process.