Software Networks: Virtualization, SDN, 5G, and Security

Nowadays there exist different networks for different purposes like voice, data, and all sorts of video. The telephony, Internet, and cellular networks refer to different domains and each has its own protocol and services. The idea behind the Next Generation Network (NGN) is that one network which transports all type of data and provides services by the form of packets similar to those which is used on Internet. Commonly NGNs are built around Internet Protocol (IP). That's why sometimes NGN is referred to as an all-IP network to describe the transformation towards Next Generation Network (NGN). Software Defined Networks (SDN) is an emerging network paradigm which introduces programmability to networks and has the capability to dynamically configure the network. In a traditional IP based network the control part and the data forwarding elements are imposed in a single box that has very limited ability to configure the network, some vendor specific codes run on the forwarding elements to perform this task. SDN takes another approach by decoupling the controller part from the data plane part. It is the next generation Internet technology that solves the ossification of the Internet, along with creating massive innovations so that network management can be easily handled. In this paper, we are trying to explore the different layers, various protocols supported by SDN, along with discuss the numerous benefits of it.

This book examines almost any emerging trend in the way people work, IT departments deliver applications or companies collect and process business information, and it'll translate into increasing pressure on today's wired and wireless networks at all scales of operation — data center, LAN, campus, WAN. This book investigates areas where SDN can help other emerging technologies deliver more efficient services, such as loT, industrial loT, NFV, big data, blockchain, cloud computing, and edge computing. Many next generation network technologies have been focusing on implementing new standards to deal with low power and energy efficiency since this is an important challenge across all forms of networking in the future. This book highlights the importance of security in the design, development and deployment of systems based on Software-Defined Networking (SDN) and Network Functions Virtualization (NFV).