Traditional WAN is the connection between branches, HQ, data centers and the clouds that connects all users and things to application and data. As more business process are digitized and new applications moving into cloud, the volume of data is rising, creating more complex network challenges, inefficient and expensive WAN.
SD-WAN is a new, virtualized approach of building WAN network to solve these WAN challenges. It applies software-defined network virtualization technology to create an overlay network on top of lower cost Internet broadband links to build high performance WAN, enable enterprise to build Internet-First WAN while improving the scalability, bandwidth and WAN performance.