The correct answer is NVDS. In NSX-T Data Center, the component that provides virtual switching capabilities is the NSX Virtual Distributed Switch (NVDS). NVDS plays a critical role in enabling and managing network virtualization in NSX-T. This is distinct from traditional virtual switch components such as the VSS and VDS found in vSphere environments, which serve different purposes. The NSX-T NVDS is specifically designed to handle the advanced networking and security services required in NSX-T deployments.