JNCIA-Cloud: Juniper Networks Certified Associate – Cloud (2021) — Question 43

Which interface is used by applications, orchestration systems, and other types of business systems to communicate with an SDN controller?

Answer options

• A. east-west interface
• B. northbound interface
• C. southbound interface
• D. controller interface

Correct answer: B

Explanation

The northbound interface is specifically designed for applications and orchestration systems to communicate with the SDN controller, making it the correct choice. The east-west interface typically refers to communication between devices within the same layer, while the southbound interface connects the controller to the network devices, and the controller interface is a more generic term that does not specify the direction of communication.