From the course: Networking Foundations: Wide Area Networks (WANs)
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Software-defined WAN (SD-WAN)
From the course: Networking Foundations: Wide Area Networks (WANs)
Software-defined WAN (SD-WAN)
- [Instructor] Let us now talk about SD-WAN. SD-WAN stands for software-defined wide area network. As the name implies, it is a WAN implementation that is designed, deployed, and managed all on a software level. Don't get me wrong, of course, we do still need infrastructure in place, but that will only be on the side of the service provider. The infrastructure is what we refer to as the underlay. You don't see it on your premises, but it's there, somewhere out there. To manage the network, we'll simply use software. Hence, it is software-defined. The software on top of the underlay is what we refer to as the overlay. So in essence, an SD-WAN is a type of an overlay network that provides a wide area network. But how do we do it? Again, it is software-defined. That means behind the scenes are scripts of codes to create a virtual network. Scripts are also used to automate tasks and to orchestrate how multiple devices will work together to form a secure and efficient network. But why? Why…
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