JNCIA-Cloud: Juniper Networks Certified Associate – Cloud (2021) — Question 38

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

Answer options

• A. The SDN controller pushes configuration files to each device in the network using RESTful APIs.
• B. The forwarding plane of each device in the network is programmed by the controller.
• C. The control plane of each device in the network is instantiated by the controller.
• D. The forwarding plane of each device in the network is managed by the device.

Correct answer: B

Explanation

The correct answer is B because in an OpenFlow-based SDN, the controller is responsible for programming the forwarding plane of each device, allowing centralized control of data flow. Options A and C are incorrect as the controller does not push configuration files or instantiate the control plane; it instead manages the forwarding plane. Option D is also wrong since the forwarding plane is not managed by the device itself in this architecture.