What is SD-WAN? say GOODBYE to MPLS, DMVPN, iWAN… w/ SDN, Cisco and Viptela

What is sd-wan? say goodbye to mpls, dmvpn, iwan… w/ sdn, cisco and viptela

software-defined wan (wide area network). what is it? how is it different from dmvpn and iwan and are we still using mpls? sd-wan is changing the game and it took me a bit to wrap my head around it because it is strange!!