200-301 Question 475
Single answerA network engineer is tasked with implementing a Software Defined Networking (SDN) solution in a data center. The engineer needs to ensure that the SDN controller is responsible for making decisions about routing and forwarding, while leaving the actual forwarding of traffic to the network devices. Which concept best describes this approach?
- A
Centralized management of network policies
- B
Separation of control plane and data plane
- C
Integration of control and data planes
- D
Distributed control plane architecture
Show answer and explanation
Correct answer: B
Explanation
In Software Defined Networking (SDN), the control plane, which makes decisions about routing and forwarding, is separated from the data plane, which handles the actual forwarding of traffic. This separation allows the SDN controller to centralize control functions and simplifies network management. The correct answer, 'Separation of control plane and data plane,' describes this concept accurately.
- A. Incorrect.
This option refers to the overall management of network policies but does not explicitly describe the division between decision-making and traffic forwarding.
- B. Correct.
This option correctly identifies the concept where the control plane (decision-making) is separated from the data plane (traffic forwarding). It is fundamental to SDN architecture.
- C. Incorrect.
This option is incorrect because it refers to combining the control and data planes, which is the opposite of what is being implemented in this scenario.
- D. Incorrect.
This option refers to a design where control decisions are distributed among devices rather than centralized in a controller, which does not align with the SDN approach described.