What feature of NSX-T Data Center ensures consistent policy configuration across instances?

The feature that ensures consistent policy configuration across instances in NSX-T Data Center is federation. Federation allows for the synchronization of networking and security policies across multiple NSX-T instances or sites. This capability is crucial for maintaining uniformity in the network architecture, especially in multi-cloud or hybrid cloud environments where multiple NSX-T deployments may exist.

With federation, administrators can manage and apply policies at a centralized level, ensuring that configurations remain consistent and reducing the risk of misconfigurations that could arise from managing each instance individually. This level of orchestration is essential for enterprises that require seamless operations across geographically dispersed environments.

While other options provide important functionalities within NSX-T, they do not specifically address the need for consistent policy configuration across multiple instances like federation does.