Identify the southbound interfaces.
Answers
Southbound APIs facilitate efficient control over the network and enable the SDN Controller to dynamically make changes according to real-time demands and needs. OpenFlow, which was developed by the Open Networking Foundation (ONF), is the first and probably most well-known southbound interface. It is an industry standard that defines the way the SDN Controller should interact with the forwarding plane to make adjustments to the network, so it can better adapt to changing business requirements. With OpenFlow, entries can be added and removed to the internal flow-table of switches and potentially routers to make the network more responsive to real-time traffic demands. Besides OpenFlow, Cisco OpFlex (the company’s response to OpenFlow) is also a well-known southbound API.