Software-Defined Wide Area Network (SD-WAN) is a software-based network technology that delivers virtualized resources to wide area network connections over both ordinary broadband Internet and private links. Applying the concepts of software-defined networks to WANs, SD-WAN abstracts traffic management and monitoring from network hardware and applies them to individual applications. 

SD-WAN can more effectively route all network traffic between data centers, branch offices, and the cloud than traditional WAN routers. SD-WAN dynamically uses multiple available connections to find the best delivery path for traffic across the entire network, eliminating jitter and dropped data packets, to deliver an optimal user experience in even the most far-flung remote offices. 

SD-WAN provides a software abstraction to create a secure, reliable, transport-independent network overlay and decouples networking software services from the underlying hardware.

Because SD-WAN is cloud-delivered and software-based, it allows for network agility, is easy to deploy, and enables central management and control. It also helps companies reduce the amount of WAN traffic on leased lines, shifting some of it to broadband Internet connections and cloud-based applications. 

With SD-WAN, companies can quickly add access to cloud services, set up a new remote office, and dynamically route all types of network traffic for optimized application and data delivery. SD-WAN allows for various deployment options, including complete cloud- or software-based, hardware-based, or hybrid deployment. Also, a centrally-located orchestrator monitors all network activity to deliver real-time analytics and reporting as well as remotely remediate any issues.