CCNA: Cisco Certified Network Associate — Question 456

In an SDN architecture, which function of a network node is centralized on a controller?

Answer options

• A. Creates the IP routing table
• B. Discards a message due filtering
• C. Makes a routing decision
• D. Provides protocol access for remote access devices

Correct answer: C

Explanation

The correct answer is C because, in SDN, the controller is responsible for making routing decisions, which allows for dynamic control of the network. Options A, B, and D describe functions that are typically executed locally by network devices and not centralized in the controller.