SD-WAN stands for Software Defined – Wide Area Networks. This system grew out of the routing technique called MPLS – Multiprotocol Label Switching. MPLS is a routing technique in telecommunications networks that directs data from one node to the next based on labels rather than network addresses. Whereas network addresses identify endpoints the labels identify established paths between endpoints. (Had enough tech talk?)
As internal networking has grown over the years the systems have become Software Defined Networks (SDN). SD-WAN can be seen as SDN for the WAN. It represents, arguably, the most popular and widely deployed use case in SDN. The SDN model became popular for abstracting network infrastructure in the data center and other sections within the enterprise perimeter. SD-WAN played a similar role but needed to abstract infrastructure elements that were diverse in terms of link types, providers, and geographies. Since it crossed the enterprise perimeter, it needed a robust security component as well.
The traditional model of backhauling all traffic from branch offices to the data center for robust security inspection is no longer optimal as it wastes a lot of bandwidth and adds latency, ultimately impairing application performance like VoIP. There is a real need for a better way to send traffic directly over the internet from branch locations to trusted SaaS and cloud-based applications while maintaining compliance with enterprise security mandates.
An SD‑WAN assures consistent application performance and resiliency, automates traffic steering in an application-driven manner …