Artificial intelligence (AI), cloud computing, and the internet of things are changing how business gets done, but they can also overly tax traditional networks. Software-defined wide area network (SD WAN) is a virtual overlay to your current WAN, such as MPLS. A WAN is a collection of local area networks (LAN) that interconnect to create a cohesive network of computing devices. WAN ensures that information passes quickly and efficiently across long distances to many different connection points. SD WAN gives your network administrator more granular control to prioritize traffic. SD WAN does not replace your traditional WAN. Instead, it overlaps the WAN and internet connections, complementing them by securely directing the flow of information more logically and cost-effectively.