Where can identifiers for Configuration Items be set?

The correct answer is found within the context of Discovery Definition, specifically under CI Identification and then Identifiers. This is because within ServiceNow, the Discovery Definition module plays a vital role in controlling how Configuration Items (CIs) are identified during the discovery process. The identifiers set in this area define the crucial parameters that help in accurately determining and classifying the CIs that are discovered in your environment.

When you configure identifiers in this section, you are directly affecting how ServiceNow recognizes and manages different types of CIs. These identifiers can include a range of attributes that uniquely define a CI, ensuring that there is no overlap or misclassification when multiple similar items are discovered. By managing identifiers effectively, the system can maintain a clear and organized structure for asset management and configuration, which is crucial for effective IT service management.

The other options, while they may seem plausible, do not specifically pertain to the exact location and relevance of identifying CIs within the discovery process. They may reference different aspects of CI management or discovery settings but do not directly address setting identifiers, which is why they are not the correct choices.