The document discusses software-defined wide area networks (SD-WANs) and their increasing adoption. It notes that digital business is innovating faster than traditional network infrastructure. SD-WANs use software to dynamically distribute traffic across multiple connection types based on application policies. The document reviews the current state of enterprise networks and drivers for SD-WAN adoption like cloud migration. It provides an overview of the SD-WAN market and vendor landscape. The document also outlines considerations for SD-WAN evaluation and recommends when organizations should look to adopt SD-WAN technology.