Which one of the following in the CMDB Identification and Reconciliation application allows a CMDB administrator to specify authorized data sources that can update a CMDB table or a set of table attributes?

Reconciliation Rules are a fundamental component of the ServiceNow CMDB Identification and Reconciliation (IRE) engine. Their specific purpose is to maintain data integrity by controlling which data sources are permitted to update Configuration Items (CIs) and their attributes. A CMDB administrator defines these rules to assign a priority (precedence) to each discovery source or data provider. When multiple sources provide data for the same CI attribute, the IRE consults the Reconciliation Rules to determine which source is the most authoritative and should be used for the update, preventing less reliable data from overwriting trusted information.

A. Reclassification Tasks: These are tasks automatically created when the IRE determines a CI should belong to a different class. They manage the class change process, not data source authority.
B. Identification Rules: These rules define the set of attributes used to uniquely identify a CI. They are used to find existing CIs or determine if a new one should be created, not to control attribute updates.
C. Datasource Precedence Rules: While this term accurately describes the function of Reconciliation Rules (i.e., setting precedence for data sources), "Reconciliation Rules" is the official name of the feature and the records configured in the ServiceNow platform.

1. ServiceNow Product Documentation - CMDB reconciliation: "Reconciliation rules specify which data sources can update a table or a set of attributes within a table. You can create reconciliation rules for a specific data source, and specify the tables and attributes that it can update." This document explicitly defines the function of Reconciliation Rules as described in the question. (Refer to the "CMDB reconciliation" section in the Washington DC release documentation).

2. ServiceNow Product Documentation - Create a CMDB reconciliation rule: "Create data source precedence rules to control which data sources can update specified tables and attributes in the CMDB. A data source precedence rule is a reconciliation rule that specifies a data source and the table or attributes that the data source is authorized to update." This clarifies that "Reconciliation Rule" is the formal object being created. (Refer to the "Create a CMDB reconciliation rule" section in the Washington DC release documentation).