Here is my short video on SD-WAN product architecture and its internal foundational VPN Networks with which the core SD-WAN product is built upon. As with any VPN network this will inturn makes the overall SD-WAN connected networks inefficient due to fundamental VPN encapsulation overheads. Hence to mitigate the same it is crucial to perform WAN Optimization on the same to compensate VPN overheads and thus improve the efficiency of the SD-WAN network.
