ols that certify certain guaranteed performance in terms of service delivery. Here, focus is on the quality of service within the SDN network with its comparison and implementation using simulation. Types of quality of service are also discussed in this chapter with a focus on the ways of implementation of quality of service. The authors define a QoS management and orchestration architecture that allow them to manage the network in a modular manner. Performing the operation and results in such a network is shown as are the outputs for the same. INTRODUCTION Software defined network changes the networking in terms of type of configuration and managing the networks. SDN provides the abstraction of underlying network with the application reside in the upper layer. SDN provides an innovative approach to decouple the logic of control plane and data plane. Software-Defined Networking (SDN) is a latest technology that is dynamic, manageable, cost-effective, and adaptable, making it ideal for the high-bandwidth, dynamic nature of today's applications (Kannan Govindarajan, Kong Chee Meng, Hong Ong, (2013); Kim H., Feamster N., (2013)). SDN architecture decouples the control plane and data plane functions enabling the DOI: 10.4018/978-1-5225-3640-6.ch009 Copyright © 2018, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Quality of Service in SDN Technology control plane to become directly programmable and the underlying infrastructure to be abstracted for applications and network services (Akram Hakiria, Aniruddha Gokhalec, Pascal Berthoua, Douglas C. Schmidt, (2014); Kind M., Westphal F., Gladisch A., Topp S.,(2012)). The Open Flow protocol is a foundational element for building SDN solutions. The SDN architecture is: Directly Programmable: Control plane is directly programmable because it is decoupled from data plane (forwarding functions). Agile: Abstracting contr