CCNA: Cisco Certified Network Associate — Question 849

What describes the functionality of southbound APIs?

Answer options

• A. They enable communication between the controller and the network device.
• B. They communicate with the management plane.
• C. They use HTTP messages to communicate.
• D. They convey information from the controller to the SDN applications.

Correct answer: A

Explanation

The correct answer, A, highlights that southbound APIs facilitate interaction between the controller and the network devices, which is their primary function. Options B and C describe functions related to other types of APIs, while D refers to the flow of information to applications rather than the direct communication with network devices.