Network World defines SD-WAN as “combining multiple physical WAN links into one logical network and providing traffic prioritization to accelerate application performance. Using network abstraction, SD-WAN improves the economics of branch connectivity by enabling organizations to leverage inexpensive circuits, such as the Internet, to address growing bandwidth requirements. According to Frost & Sullivan, almost 70% of US IT decision makers say they will replace branch routers with an SD-WAN appliance.