In NSX-T, which method is used for virtual network segmentation?

In NSX-T, the method used for virtual network segmentation is overlays. The overlay network is a fundamental feature of NSX-T, enabling organizations to create logical networks that are decoupled from the physical infrastructure. This allows network segmentation at a granular level, meaning that multiple isolated networks can coexist on the same physical infrastructure without being limited by traditional VLAN tagging.

Overlays use encapsulation techniques like VXLAN (Virtual Extensible LAN) to create virtual tunnels, which support advanced networking features such as multi-tenancy, security policies, and efficient traffic routing among virtual machines across various hosts. This flexibility and scalability are essential for modern cloud environments and data centers.

In contrast, other methods, such as VLANs, while still prevalent in traditional networking, do not offer the same level of agility and isolation as overlays do in the context of virtualized environments. Additionally, SSIDs pertain to wireless networking and are not applicable to the segmentation strategies used in NSX-T. Subnets, while relevant for IP addressing within a logical network, do not dictate segmentation on their own without the virtual constructs provided by overlays.