Which feature primarily supports micro-segmentation in NSX-T?

The feature that primarily supports micro-segmentation in NSX-T is the Distributed Firewall. This component enables granular control over east-west traffic within the data center, allowing administrators to implement security policies on a per-VM basis. With micro-segmentation, organizations can create security policies that are closely aligned with their applications and workloads, rather than relying solely on perimeter-based security.

The Distributed Firewall operates at the hypervisor layer, which means it can enforce security policies in real-time without needing to route traffic through a central appliance, thus improving both performance and security. This is crucial in modern environments where applications are often distributed across multiple locations and need fine-tuned security measures.

Other options do not provide the necessary capabilities for micro-segmentation. For instance, Network Address Translation (NAT) primarily helps in translating private IP addresses to public IP addresses and vice versa, which does not involve policy-based access control. Standard Switches are more focused on connecting virtual machines and do not include advanced security features like micro-segmentation. VLAN Tagging serves the purpose of segmenting network traffic at Layer 2 but lacks the dynamic and policy-driven approach that micro-segmentation requires in contemporary network security strategies.