Which statement is true regarding an OpenFlow controller-based software defined network?

Which statement is true regarding an OpenFlow controller-based software defined network?
A . The forwarding plane of each device in the network is programmed by the controller
B . The control plane of each device in the network is instantiated by the controller
C . The SDN controller pushes configuration files to each device in the network using RESTful APIs
D . The forwarding plane of each device in the network is managed by the device

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Answer: A