As enterprise IT considers ways to improve WAN functionality and service levels while lowering costs, the interest in SD-WANs has dramatically increased. But not all SD-WANs are created equal. As new applications emerge, whether hosted on premise or in the cloud, demands on WAN throughput, efficiency, and reliability increase. Performance-driven SD-WANs significantly improve application performance and Quality of Service (QoS) making it even easier for enterprises to justify adopting SD-WAN solutions.