DefinePK

Abstract

Software Defined Networks (SDN) is an emerging new network paradigm which enables network programmability and breaks the network vertical integration by separating network intelligence from underlying network devices such as routers and switches. SDN promotes the logically centralized control to program the network. SDN decouples data plane and control plane of the network devices to simplify the network management and great innovation by network programmability, using Open Flow as a communication protocol between SDN controller and network elements. This paper presents a comprehensive critical survey on SDN and Open Flow. The main aim of this paper is to give a brief introduction of SDN, the basic architecture of SDN and to show the control plane and data plane separation. The building blocks of SDN as layers are provided with study of infrastructure, southbound, controllers, northbound and network applications. Later research challenges and distributed computing in SDN are discussed to provide future researcher's brief idea about the future scope in the field.