The present age of network technologies is controlled by conventionally defined Transmission Control Protocol/Internet Protocol (TCP/IP) prototypical and coupled devices. These are based on old-fashioned switching and routing models and they follow tightly coupled hardware and software concepts. The current network solutions and their complexity at local area network, wide area network and at data centre levels facing new challenges to manage them and difficult to meet the flexibility demands and requirements of growing IT industry. The software defined networking and network functions virtualization are emerging concepts to handle these new requirements and challenges. The primary purpose of SDN is to separate tightly coupled control and data planes of traditional network devices. Whereas network functions virtualization takes physical devices functions and place them on a server that can perform functions same like an actual device. Openflow is the communication protocol used for the communication between data and control planes.