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Implementing and Operating Cisco Security Core Technologies (SCOR) · Cisco
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
In SDN architecture: * Applications ↔ Controller = Northbound API * Controller ↔ Network devices = Southbound API So if a security application notifies the controller about a threat, that communication is occurring through a northbound API. That means the more Cisco-aligned exam answer is actually: ✅ D. northbound API
I go with B. For me Northbound would be to control policies and simplify the management actions. Westbound is to integrate the controller with other devices, and use inputs received from other devices.
https://learningnetwork.cisco.com/s/question/0D53i00000Kt419CAB/what-is-the-difference-between-northbound-and-southbound-interfaces I reviewed the topic. It should be northbound based on the above article. (Application is sending notification.)