Software defined networking: Viewpoint from IP networking, PROS nd CONS and exploration thoughts

Software Defined Networking (SDN) introduces programmability and thus flexibility to the network. One can change the network as easily as changing the application. Traditional networks are vendor specific, and are quite difficult (and incur high costs) to make any changes in configuration. The current trends of mobility and Internet allow a multitude of devices to consume unimaginable data across the existing network architecture. One has the building need to modify the existing network architecture to cater to demands of increasing bandwidth, efficient usage of resources and quality of services. SDN provides what cloud provided when memory was in high demand, flexibility. SDN provides a single point of control, and a layer of abstraction between the applications and the network, thereby reducing the overhead of processing undertaken by the hardware networking components.