The Northbound API operates in the application layer, enabling communication with the SDN controller for application intent.

The Northbound API is used by SDN controllers to translate application-specific instructions into actionable commands for network configuration.

Abstraction in SDN involves simplifying complex network operations and configurations for easy management and implementation.

Software programmability in SDN allows for network customization, efficiency, and dynamic management through coding.

The Southbound API facilitates direct communication between the SDN controller and network devices, managing data flow and network paths.

The SDN controller serves as the network’s brain, making decisions and forwarding instructions to devices according to policies.

SDN simplifies network administration by allowing centralized management and dynamic configuration of network resources.

SDN supports dynamic networking through its ability to enable flexible configuration and adaptation to changing workloads.

OpenFlow is a widely adopted protocol enabling communication between the SDN controller and network devices, allowing dynamic network configuration.

Abstracting network complexities enables SDN controllers to easily implement policy changes across network devices.

SDN’s centralized control enables automation and programmability, distinguishing it from traditional networks.

The infrastructure layer contains the physical network components, including switches and routers, within the SDN architecture.

The application, control, and infrastructure layers are fundamental components in the SDN architecture, creating a clear separation between the network’s control plane and data plane.

SDN offers increased flexibility, enabling rapid network reconfiguration and adaptation to business needs without physical changes.

The decoupling of the control plane and data plane is a core principle of SDN, allowing for centralized control and operational flexibility.