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SD-WAN works by separating applications from the underlying network services with a policy-based, virtual overlay. This overlay monitors the real-time performance characteristics of the underlying networks and selects the optimum network for each application based on configuration policies.

Where software-defined networking (SDN) deployed in a service provider network enables flexible deployment and usage-based solutions between high capacity sites (like headquarters and data centers) SD-WAN services help optimize traffic flows for performance and cost at branch sites.

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.

The main goal of SD-WAN (SDWAN) technology is to deliver a business-class, secure, and simple cloud-enabled WAN connection with as much open and software-based technology as possible.

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