control the control plane of all the nodes within the network. Subsequent chapters also discusses on number of controllers available in the market and difference in the manner of working and operations. Controllers which are heart of SDN technology are discussed in details which include the working of controllers within SDN network. Controllers which are used for solving the networking problems with their own intelligence. The controllers are present on the top-most layer which works as a cloud which has the power to Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Preface regulate, maintain and making decisions both manually and automatically. The controllers underlies with many application services like message routing, data storage and formatting etc. Discussion over different types of controllers available for SDN networks are discussed with their comparison with each other which will make the choice for controller selection easier. Security aspects related to SDN networks are discussed which covers many aspects related to SDN security including attacks like DoS, DDoS with different solutions to minimize the effect of these attacks. Quality of Service within SDN network is focused which includes different strategy being used for implementation of quality of service and their performance comparison by using simulation results. Discussion of SDN technology with respect to associated technologies are also discussed in the chapters following. SDN technology relation with wireless sensor network, in terms of it's working with wireless sensor network and the research area related to the topics has been discussed. The connection of software defined area with software defined area has been discussed with automation of software defined area has been discussed in this book. A different perspective in terms of software defined area has been discussed in terms of software defined storage has been discussed and explained that how large data can be managed in terms of software defined 