In a controller-based network architecture, what is a function of Southbound APIs?
They define policies for user access control.
They allow applications to communicate with the network controller.
They enable communication between the controller and network devices.
They facilitate direct user interaction with network infrastructure.
Southbound APIs are used by the network controller to communicate with network devices such as switches and routers. They enable the controller to send instructions and configurations to these devices, managing the data plane. The other options are not functions of Southbound APIs: Northbound APIs allow applications to communicate with the controller; defining user access policies is related to security mechanisms; facilitating direct user interaction with infrastructure is not associated with Southbound APIs.
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