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Question 12: Reconciliation Rules
What is the primary purpose of configuring Reconciliation Rules?
- A. To control which data source is authorized to update specific fields.
- B. To improve the execution speed of Discovery.
- C. To automatically archive unnecessary CIs.
- D. To automatically set the priority of incidents.
A. To control which data source is authorized to update specific fields.
【Detailed Explanation】
Why A is the correct answer (Role of Reconciliation):
ServiceNow’s CMDB receives information about the same CI from multiple data sources, such as Discovery, SCCM, manual input, and external APIs. Reconciliation Rules perform “traffic control” to prevent data conflicts.
- Data Source Priority: It allows for field-level trust settings. For example, you can define that “CPU count data from Discovery is trusted, but Asset Tag data entered manually in ServiceNow takes priority.”
- Prevention of Unintended Overwrites: It prevents less reliable sources (e.g., an old CSV import) from accidentally overwriting the latest automatically detected data (e.g., from Discovery).
Why the other options are incorrect:
- B (Discovery Execution Speed): This depends on network configuration and MID server specifications. Reconciliation rules process data after it arrives, so they do not impact scan speeds.
- C (CI Archiving): This is the responsibility of the CMDB Data Manager or Data Retention Policies. Reconciliation rules are meant for managing the “update permissions” for existing data.
- D (Incident Priority): This is governed by ITSM processes, such as Priority Data Lookups, and is unrelated to CMDB reconciliation.
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