300-435 Question 149
Single answerA network engineer is tasked with implementing a solution that provides centralized control of the network, dynamic traffic management, and the ability to deploy network policies programmatically. How does a software-defined network (SDN) differ from a traditional network in meeting these requirements?
- A
SDN separates the control plane from the data plane, enabling centralized management.
- B
Traditional networks inherently allow for dynamic traffic management and policy-based automation.
- C
SDN uses a distributed control plane to achieve scalability and programmability.
- D
Traditional networks require manual configuration of each device, limiting scalability and agility.
Show answer and explanation
Correct answer: A
Explanation
Software-defined networking (SDN) is designed to address the limitations of traditional networks by separating the control plane from the data plane. This separation allows for centralized network management, dynamic traffic handling, and the ability to deploy policies programmatically. Traditional networks, on the other hand, rely on decentralized control, which often requires manual configuration and lacks the agility and scalability that SDN provides.
- A. Correct.
Correct: SDN separates the control plane from the data plane, allowing for centralized management and programmatic control, which is ideal for dynamic traffic management and deploying policies.
- B. Incorrect.
Incorrect: Traditional networks do not inherently provide dynamic traffic management or policy-based automation; these features are typically limited and require significant manual intervention.
- C. Incorrect.
Incorrect: SDN relies on a centralized control plane, not a distributed one, to achieve programmability and centralized management.
- D. Incorrect.
Incorrect: While this statement describes a limitation of traditional networks, it does not explain how SDN meets the engineer's requirements.