Which plane is responsible for network decision making in both a controller-based network and a traditional network?

Which plane is responsible for network decision making in both a controller-based network and a traditional network?

• A. Data plane
• B. Control plane
• C. Management plane
• D. Application plane

Answer: (B)

Decision making in a network is handled by the control plane. This layer contains the logic that determines how traffic should be routed or switched, turning policies into forwarding instructions. In a controller-based network, the control plane is centralized in the SDN controller, which makes routing and policy decisions and programs the data plane devices with the necessary rules. In a traditional network, the control plane is distributed across routers and switches, each device running routing protocols to decide paths and build forwarding tables that the data plane uses to forward packets. The data plane simply carries out those decisions, while the management and application planes handle configuration, monitoring, and services.

Decision making in a network is handled by the control plane. This layer contains the logic that determines how traffic should be routed or switched, turning policies into forwarding instructions. In a controller-based network, the control plane is centralized in the SDN controller, which makes routing and policy decisions and programs the data plane devices with the necessary rules. In a traditional network, the control plane is distributed across routers and switches, each device running routing protocols to decide paths and build forwarding tables that the data plane uses to forward packets. The data plane simply carries out those decisions, while the management and application planes handle configuration, monitoring, and services.