Software Defined Networking concepts and challenges

Software Defined Networking (SDN) is an emerging networking paradigm that greatly simplifies network management tasks. In addition, it opens the door for network innovation through a programmable flexible interface controlling the behavior of the entire network. In the opposite side, for decades traditional IP networks were very hard to manage, error prone and hard to introduce new functionalities. In this paper, we introduce the concepts & applications of SDN with a focus on the open research challenges in this new technology.