Exam CIS-DF Topic 3 Question 151 Discussion
Actual exam question for ServiceNow's CIS-DF exam
Question #: 151
Topic #: 3
Question #: 151
Topic #: 3
The Apache Web Server Identification Rule is configured with the following criterion attributes:
Class
Configuration file
Version
Yesterday, an Apache Web Server CI was discovered as part of Service Mapping. Today, the application owner upgraded Apache to a different version and reran discovery of the service.
What will happen in the CMDB?
Class
Configuration file
Version
Yesterday, an Apache Web Server CI was discovered as part of Service Mapping. Today, the application owner upgraded Apache to a different version and reran discovery of the service.
What will happen in the CMDB?
Suggested Answer: B Vote an answer
This scenario hinges on how the Identification and Reconciliation Engine (IRE) in ServiceNow evaluates identification rules.
The identification rule for the Apache Web Server class includes Version as part of the identifier criteria, along with Class and Configuration file. Identification rules must match all criterion attributes exactly for an incoming record to be identified as an existing CI and reconciled.
Yesterday's discovery created an Apache Web Server CI with a specific version value. When Apache is upgraded and discovery is rerun, the Version attribute changes. Because Version is part of the identifier, the incoming record no longer matches the existing CI's identifier entry. As a result, the IRE cannot identify the existing CI as the same configuration item.
When identification fails and no matching identifier entry is found, the IRE proceeds to insert a new CI record rather than updating the existing one. This behavior is intentional and protects the CMDB from incorrectly reconciling records that no longer meet identification criteria.
The identification rule for the Apache Web Server class includes Version as part of the identifier criteria, along with Class and Configuration file. Identification rules must match all criterion attributes exactly for an incoming record to be identified as an existing CI and reconciled.
Yesterday's discovery created an Apache Web Server CI with a specific version value. When Apache is upgraded and discovery is rerun, the Version attribute changes. Because Version is part of the identifier, the incoming record no longer matches the existing CI's identifier entry. As a result, the IRE cannot identify the existing CI as the same configuration item.
When identification fails and no matching identifier entry is found, the IRE proceeds to insert a new CI record rather than updating the existing one. This behavior is intentional and protects the CMDB from incorrectly reconciling records that no longer meet identification criteria.
by Spring at Aug 29, 2026, 12:59 AM
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