300-435 Question 151
Select 3An enterprise is planning to transition from a traditional network to a software-defined network (SDN) in order to improve scalability and network automation. Which of the following characteristics of SDN differentiate it from traditional networks and align with the enterprise's goals?
- A
Control plane and data plane are decoupled in SDN.
- B
Network devices in SDN operate independently without central control.
- C
SDN enables centralized management and programmability through a controller.
- D
Traditional networks inherently support dynamic, automated policy updates across devices.
- E
SDN leverages APIs to interact with network devices for automation.
Show answer and explanation
Correct answers: A, C, E
Explanation
SDN fundamentally differs from traditional networks by decoupling the control and data planes, allowing centralized control and programmability. This enables greater automation, scalability, and flexibility, which are essential for modern enterprise networks. Traditional networks, in contrast, rely on device-specific configurations and lack the centralized management capabilities of SDN.
- A. Correct.
Correct: In SDN, the control plane (decision-making) is separated from the data plane (traffic forwarding), making the network more flexible and easier to manage.
- B. Incorrect.
Incorrect: In SDN, network devices rely on a centralized controller for instructions, unlike traditional networks where devices operate independently.
- C. Correct.
Correct: SDN centralizes network management using a controller, allowing for easier implementation of automation and scalability.
- D. Incorrect.
Incorrect: Traditional networks require manual configurations and do not natively support dynamic, automated policy updates.
- E. Correct.
Correct: SDN uses APIs to facilitate communication between the controller and network devices, enabling automation and programmability.