CCNA: Cisco Certified Network Associate — Question 909

What describes a northbound REST API for SDN?

Answer options

• A. network-element-facing interface for GET, POST, PUT, and DELETE methods
• B. application-facing interface for SNMP GET requests
• C. application-facing interface for GET, POST, PUT, and DELETE methods
• D. network-element-facing interface for the control and data planes

Correct answer: C

Explanation

The correct answer is C because a northbound REST API serves as an application-facing interface allowing the use of GET, POST, PUT, and DELETE methods for application interactions. Option A describes a southbound interface, while B focuses on SNMP which is not RESTful, and D refers to network elements rather than applications.