What does a Configuration Management Database (CMDB) contain?

A Configuration Management Database (CMDB) is a critical component in IT service management and is primarily designed to store information about the hardware and software components, known as Configuration Items (CIs), within an organization. The correct option highlights that a CMDB contains attributes and history of each Configuration Item.

This includes detailed information such as the configuration item's specifications, status, relationships with other items, and historical data showing changes over time. By maintaining this information, a CMDB allows IT professionals to better understand the configuration of their IT environment, manage changes effectively, and support incident and problem management processes.

The other options do not align with the purpose of a CMDB. Employee performance reviews pertain to human resources and management rather than IT configuration. Call logs from the support center primarily relate to incident tracking and service management. Commercial agreements and contracts, while significant for governance and procurement, do not fit the specific context of a CMDB's software and hardware focus. Thus, the specifics of configuration items and their histories are the primary data stored in a CMDB.