Software defined networking

Software defined networking (SDN) is the new network technology. It emphasises the separation of the network and the control plane. Responsibility is divided between both the planes. The forward plane is only responsible for packet forwarding in the network. The control plane is responsible for policy creation and its implementation, based on predefined rules. It acts as the entry point of the system and can replace the conventional router. Any packet coming into the network is examined by the control plane and a decision is taken on whether to drop the packet or forward it to the next host. It can also update the IP table entry.