SD-WAN is the application of software based network technologies that virtualize WAN connections. SD-WAN decouples network software services from underlying hardware to create a virtualized network overlay. Enabling users anywhere to connect to applications anywhere, SD-WAN offers flexibility, simplicity, performance, security, and cloud scale. It also boasts ease of deployment, central management and control and assured application performance. SD-WAN is an essential component of Secure Access Service Edge (SASE) architecture. SD-WAN dynamically steers traffic to the best available link and remediates if transmission issues arise to ensure high performance of applications.