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What are the three key tables in an enterprise CMDB? (Choose three.)
The Configuration Management Database (CMDB) in ServiceNow is a core component of IT Service Management (ITSM), allowing organizations to track Configuration Items (CIs) and their relationships. There are three key tables that form the foundation of the CMDB:
cmdb (Base CMDB Table):
This is the parent table for all Configuration Items (CIs) in the CMDB.
It contains the foundational structure upon which all other CMDB-related tables are built.
It does not store CI records itself but serves as the primary reference table.
cmdb_ci (CI Base Class Table):
This is the base class for all Configuration Items (CIs).
All specific CI classes (such as servers, applications, networks) extend from this table.
It holds general CI attributes that are common across all CI types.
cmdb_rel_ci (CMDB Relationship Table):
This table defines relationships between different Configuration Items.
It stores dependencies and associations between CIs, such as a server hosting an application.
Relationships are critical for impact analysis and dependency mapping.
Incorrect Answer Choices Explained:
B . sn_cmdb_bak & E. cmdb_bak:
These tables do not exist in the standard CMDB schema. They may be mistaken for potential backup tables, but they are not official CMDB tables.
D . sn_cmdb & G. sn_cmdb_ci:
Prefix 'sn_' generally indicates Scoped Application Tables in ServiceNow.
Standard CMDB tables exist in the global scope without the 'sn_' prefix.
'sn_cmdb' and 'sn_cmdb_ci' are not key tables in the global CMDB architecture.
Official ServiceNow CSA (Certified System Administrator) Training Documentation
ServiceNow Product Documentation: CMDB Tables and Relationships
ServiceNow CMDB Overview and Best Practices: CMDB Guide