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200-301 · Question #1337
200-301 Question #1337: Real Exam Question with Answer & Explanation
The correct answer is D: control. In Software-Defined Networking (SDN), the control plane, which makes forwarding decisions, is centralized and decoupled from the distributed data plane.
Submitted by emma.c· Mar 5, 2026Automation and Programmability
Question
Which plane is centralized in software-defined networking?
Options
- Aapplication
- Bservices
- Cdata
- Dcontrol
Explanation
In Software-Defined Networking (SDN), the control plane, which makes forwarding decisions, is centralized and decoupled from the distributed data plane.
Common mistakes.
- A. The application plane in SDN interacts with the controller to define network policies and services but is not the plane that is inherently centralized.
- B. The services plane is a conceptual layer often associated with SDN for delivering network services, but it is not the primary plane that is centralized by the SDN architecture itself.
- C. The data plane (or forwarding plane) remains distributed across individual network devices, executing the forwarding instructions provided by the centralized control plane.
Concept tested. SDN architecture (control plane centralization)
Reference. https://learn.microsoft.com/en-us/azure/architecture/guide/networking/sdn-architecture
Topics
#SDN architecture#Control plane
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