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SD-WAN’s Potential as a Game-Changer is Growing

Software-defined WAN is one of those terms that’s vague enough to be applicable to a lot of things, but the core reality is a fairly classic “overlay model” of networking.  An overlay network is a layer on top of the “network protocol” of a real network, an overlay that provides the connectivity service to the user and uses the real network protocol (or protocols) as a kind of physical layer or virtual wire.

 

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