Which Cisco Nexus 1000V component provides the platform on which Cisco NX-OS runs and interacts with other components that make up the Cisco Nexus 1000V?

The Virtual Supervisor Module (VSM) is the control plane component of the Cisco Nexus 1000V, responsible for running the Cisco NX-OS software. It manages and orchestrates the entire virtual switch, pushing configurations and policies to the data plane components (VEMs) residing on the hypervisor hosts.

The Virtual Ethernet Module (VEM) is the data plane component of the Cisco Nexus 1000V, residing on each hypervisor host to perform actual packet forwarding for virtual machines based on policies from the VSM, but it does not run NX-OS for control.

"Virtual Service Blade" is not a recognized core component of the Cisco Nexus 1000V architecture that runs NX-OS or serves as its primary control plane.

The Virtual Security Gateway (VSG) is a virtual appliance that provides security services within the virtualized data center, not the core component of the Cisco Nexus 1000V that runs NX-OS.