Cisco's SD-WAN Routers deliver comprehensive WAN gateway and network services function for both traditional routing and SDWAN deployments. Cisco SD-WAN routers are hardware, software, cloud or virtualized solution that sit at the perimeter of a site, such as remote office, branch office, campus, or a data center. They participate in establishing a secure virtual overlay network over a mix of any WAN transports. The SD-WAN routers provide essential features of routing, forwarding, security, encryption, Quality of Service (QoS), policy, and management.