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SD-WAN is a service that enables enterprises to dynamically route traffic across a hybrid WAN based on current network status.

By replacing traditional branch routers with appliances that assess and utilize different transport technologies based on their performance, it allows enterprises to route large portions of their traffic over cost-effective services, such as broadband. As needed, voice, video, or other quality of service (QoS)-sensitive traffic is then routed over private multiprotocol label switching (MPLS) links.

Across a global network, SD-WAN is deployed either as a software-based solution or as a hardware/software combination with WAN edge devices placed at branch sites. Each device is centrally managed, with routing based on application policies and security rules created by WAN managers that can be updated in real-time as network requirements change.