350-401 Question #16: Real Exam Question with Answer & Explanation

Question

What do Cisco DNA southbound APIs provide?

Options

• AInterface between the controller and the network devices
• BNETCONF API interface for orchestration communication
• CRESful API interface for orchestrator communication
• DInterface between the controller and the consumer

Explanation

Cisco DNA Southbound APIs Explanation

Southbound APIs in Cisco DNA Center provide the communication interface between the controller and the network devices (routers, switches, access points, etc.), allowing the controller to configure, manage, and monitor the underlying infrastructure using protocols like NETCONF, RESTCONF, and OpenFlow. Option B and C are incorrect because while NETCONF and RESTful interfaces can be used as part of southbound communication, they are specific protocol examples - not the defining purpose of southbound APIs themselves, and they are more accurately associated with northbound interfaces when communicating with orchestrators. Option D is incorrect because the interface between the controller and the consumer (applications, orchestrators, or end users) describes northbound APIs, which expose the controller's capabilities upward.

🧠 Memory Tip: Think of the compass - South = Down to Devices, North = Up to Users/Apps. Southbound APIs go down to the network hardware, while northbound APIs go up to the people and applications consuming the network services.

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