SD-WAN is a faster and lower cost way to build (and manage) long distance networks. Instead of individual (typically command line based) control of, for instance, routers, control is centralized under one interface. This has multiple advantages: It simplifies network policy configuration and deployment, which allows changes across an organization through one central interface instead of making individual changes per branch/location/device. Also, it allows multiple paths to be utilized, such as broadband connections, instead of having to use expensive private circuits such as MPLS, point-to-point, etc. These benefits combine to lower costs -- both in IT staff resources and in infrastructure fees. The result is a cheaper, more agile, easier to manage network.
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