rner, J. (2008). OpenFlow: Enabling innovation in campus networks. Computer Communication Review, 38(2), 69-74. doi:10.1145/1355734.1 1355746 Nunes, B. A. A., Mendonca, M., Nguyen, X. N., Obraczka, K., & Turletti, T. (2014). A survey of software-defined networking: Past, present, and future of programmable networks. IEEE Communications Surveys and Tutorials, 16(3), 1617-1634. doi:10.1109/SURV.2014.012214.00180 Xia, W., Wen, Y., Foh, C. H., Niyato, D., & Xie, H. (2015). A survey on software- defined networking. IEEE Communications Surveys and Tutorials, 17(1), 27-51. i:10.1109/COMST.2014.2330903 KEY TERMS AND DEFINITIONS Elastic Services Controller: Elastic services controller (ESC) provides a comprehensive lifecycle management platform for NFV. Load Balancer: Used to distributes network and application traffic to number of servers to act as reverse proxy. Network Function Virtualization: A network architecture which uses concept of IT virtualization to make connection among different networking nodes. NFV Infrastructure: Set of resources that is used for hosting and connecting virtual connections. Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 NFV Practical Implementation NFV Management and Organization: Used for management and organization of NFV. Virtual Network Function: A virtualized task that is used to moves network functions out of dedicated hardware devices and into software. VNF Manager: A component of MANO architecture framework which is used to standardize the functions of virtual networking and increase the interoperability of software-defined networking elements. Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Chapter 9 Quality of Service in SDN Technology Ankur Dumka University of Petroleum and Energy Studies, India ABSTRACT With the advancement in the requirement of data, the need for stringent quality of service guarantee is a demand of the current world, which brings the network programmers to design the network protoc