SD-WAN stands for Software-Defined Wide Area Network.  Traditionally, networks were defined by the hardware devices and the circuits connecting them.  SD-WANs are defined by software that is downloaded into devices that control the movement of data packets.   One hardware network can support multiple esparate software-defined networks.  This is similar to a VLAN (Virtual Local Area Network) where one  Ethernet switch supports two separate Ethernet LANs.  Because of the high cost of wide area circuits, the benefits from SD-WANs are even greater than for VLANs because wide area connections can be share and made over low-cost public Internet circuits saving a lot of money and providing greater capacity than leased point-to-point circuits. ... View more