• Md. Saidul Islam

WAN (software-defined wide area network) is a type of networking technology that uses software- defined networking (SDN) principles to manage and optimize the performance of wide area networks (WANs). It enables organizations to securely connect users, applications and data across multiple locations while providing improved performance, reliability and scalability. SD-WAN also simplifies the management of WANs by providing centralized control and visibility over the entire network. However, implementation or test bed results is very hard. That's why some of these actual research works just to provide theoretical software defined networking. New research illustrates that software-defined WANs (SDWANs) improve QoS, facilitate network control, and connect branch offices to a main group network, or connect data centers isolated by intervals. SDW AN helps the network to provide consistent and unified security to all our networks. In this study, we come to an overview of Software-defined Wide Area Network (SDWAN) architectures and how it works, a qualitative comparison in terms of features such as virtualization and programmability. As well as, a Software-defined Wide Area Network (SDWAN) benefits from Internet-based wide area networks (WANs) to enable multi-service networks and VPN services.

Network, SDWAN, SaaS, QoS.

"Software-Defined Wide Area Network Architectures and its effect in improvement of Network Application Performance", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.502-510, December-2018, Available :http://www.jetir.org/papers/JETIR1812E91.pdf

"Software-Defined Wide Area Network Architectures and its effect in improvement of Network Application Performance", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp502-510, December-2018, Available at : http://www.jetir.org/papers/JETIR1812E91.pdf