SD-WAN is like smartphone GPS for your network. Old networks still pass traffic like travelers in the Wild West, going from town to town (hops), asking for directions to their destination. Maps made it easier to find a place or route that you or someone else had already been to, but reading a map and figuring out the path at 80 MPH slows you down. SD-WAN takes all the great capabilities of your automated GPS, like warning you if the path you're are on will slow you down due to traffic, re-route you around an accident, or allow you to set preferences like avoiding tolls; and puts them into your network so you traffic becomes smarter and avoids latency, paths that are overloaded or broken, or preferences like sending kitten videos over a cheap circuit. This allows you to make your network smarter, more efficient, and able to correct issues before they potentially become larger problems.
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