An organization is implementing a programmable network architecture that separates control and data planes. Which component is MOST responsible for maintaining security isolation between network applications and the underlying network infrastructure?
OpenFlow Protocol
Flow Tables
Network Function Virtualization (NFV)
SDN Controller
The SDN Controller is the correct answer because it mediates between the application plane and the infrastructure plane, enforcing security policies and maintaining isolation. It manages northbound APIs for applications and southbound APIs for network devices, ensuring applications can only perform authorized actions. Flow Tables are merely data structures for packet forwarding rules in switches. Network Function Virtualization (NFV) virtualizes network services but doesn't provide application-infrastructure isolation. OpenFlow is simply a southbound protocol used by the controller to communicate with network devices, not a security isolation mechanism itself.
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