200-301 Question 471
Select 3An organization is deploying a software-defined network (SDN) architecture in their data center. They need to implement a solution that separates the physical network infrastructure from the logical topology, enabling centralized management and automation. Which components of the SDN architecture should they focus on to achieve this goal?
- A
Overlay network
- B
Underlay network
- C
Fabric
- D
Control plane
- E
Data plane
Show answer and explanation
Correct answers: A, B, C
Explanation
The SDN architecture relies on separating the physical network (underlay) from the logical network (overlay) to provide centralized management and automation. The fabric encompasses this abstraction, combining both underlay and overlay networks into a cohesive system. While the control and data planes are essential components of SDN, they are not directly responsible for the separation of physical and logical topologies.
- A. Correct.
The overlay network provides the logical topology that operates independently of the physical network. It enables features like virtual network segmentation and traffic isolation.
- B. Correct.
The underlay network refers to the physical infrastructure that supports the overlay network. It ensures physical connectivity and performance for the SDN solution.
- C. Correct.
The fabric in SDN combines the overlay and underlay, creating an abstraction that simplifies network management, automation, and policy enforcement.
- D. Incorrect.
The control plane is responsible for managing and distributing routing information, but it does not directly implement the separation of physical and logical topology.
- E. Incorrect.
The data plane handles packet forwarding based on the rules received from the control plane but does not separate the physical and logical topology.