In a software-defined, controller-based network architecture, what component is responsible for creating virtualized paths between devices over the physical network?
Overlay network
Underlay network
Southbound interface
Data plane
The overlay network is responsible for creating virtualized paths between devices over the physical network in a software-defined, controller-based architecture. It allows for logical network topologies and segmentation that operate independently of the physical infrastructure. The underlay network refers to the physical network that forwards packets but does not handle virtualization. Southbound interfaces are APIs used for communication between the controller and network devices, not for creating virtual paths. The data plane handles the actual forwarding of traffic based on control plane decisions but does not establish virtualized connections.
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