SD-WAN (Software-Defined Wide Area Network) is a technology that allows for the management and optimization of a wide area network (WAN) through software, rather than through hardware-based network devices. SD-WAN allows for more flexibility and cost savings from internet bandwidth economics, increased business value from agility, as well as improved network performance. SD-WAN uses a variety of techniques such as traffic steering, encryption, and quality of service (QoS) to optimize and secure WAN connections, such as broadband and cellular. It is often used by enterprise organizations with multiple branch offices to connect to a central location.