Final answer:
IT administrators, change managers, and configuration management personnel are able to access the CMDB tables and underlying data.
Step-by-step explanation:
The roles that are able to access the CMDB tables and underlying data include:
- IT administrators and technicians: They are responsible for managing and maintaining the CMDB.
- Change managers and change advisory board members: They ensure that changes in the CMDB are properly reviewed and approved.
- Configuration management personnel: They are responsible for keeping the CMDB up-to-date with accurate and relevant information.
Note that while other roles mentioned, such as Service desk and incident management personnel and Security and compliance officers, may have access to some information in the CMDB, they do not typically have full access to all CMDB tables and underlying data.