Software Defined Networking (SDN) is a rising technique to deal with replace patrimony network (coupled hardware and software program) control and administration by separating the control plane (software program) from the information plane (hardware). It gives adaptability to the engineers by influencing the focal control to plane straightforwardly programmable. Some new difficulties, for example, single purpose of disappointment, may be experienced because of the original control plane. SDN concentrated on flexibility where the security of the system was not essentially considered. It promises to give a potential method to present Quality of Service (QoS) ideas in the present correspondence networks. SDN automatically changes the behavior and functionality of system devices utilizing a single state program. Its immediate OpenFlow is planned by these properties. The affirmation of Quality of Service (QoS) thoughts winds up possible in a versatile and dynamic path with SDN. It gives a couple of favorable circumstances including, organization and framework versatility, improved exercises and tip-top performances. This research work will concentrate on the Quality of Service (QoS) like delay, response time, throughput, and other execution assessing parameters of our proposed arrange design using internal controller, e.g., Network Operating System (NOX) and external controller, e.g., Pythonic Network Operating System (POX), Open Network Operating System (ONOS) and RYU. Regardless of the way that thoughts of QoS, they did not comprehend the correspondence systems with high utilization, diverse quality and acknowledgment costs. It will focus on the outside controller and inner controller execution in the proposed architecture. These perceptions of switch diversity may give SDN application engineer's bits of knowledge while acknowledging QoS ideas in an SDN-based system.

How to Cite
NOWSIN AMIN SHEIKH, Mohammad. SDN-Based Approach to Evaluate the Best Controller: Internal Controller NOX and External Controllers POX, ONOS, RYU. Global Journal of Computer Science and Technology, [S.l.], feb. 2019. ISSN 0975-4172. Available at: <https://computerresearch.org/index.php/computer/article/view/1793>. Date accessed: 20 mar. 2019.