Although it seems like something that could be very complicated, in reality SD-WAN (software defined wide area network) is simply a network architecture that exists on the top layer that allows a networking structure which can be easier to manage than traditional WAN. All you are doing, is basically shifting the control layer to the cloud so that you have a more streamlined and centralized network management system. In the process, SD-WAN will enable network virtualization so that your systems will be more flexible, dynamic and easily administered.
If your organization has multiple locations or is spread across a large geographical footprint, the utilization of legacy WAN can be expensive, complicated to support and difficult to keep updated.
The use of SD-WAN architecture can give your IT team more control, with centralized management of the system to effectively leverage all available network connections. It also provides better flexibility to adjust the bandwidth as requirements change without needing to increase the invest in additional bandwidth or equipment. By utilizing SD-WAN, an enterprise can easily add or remove WAN connections as needed or they can combine cellular and fixed-line connections. SD-WAN can also reduce recurring network costs by using all available network connections instead of only specific ones while also allowing cost effective deployment of new circuits that are handled quickly via the cloud unlike traditional MPLS connections, which can need long provisioning times.
Want to know how to secure SD-WAN through Segmentation, Encryption, and Unification? Check out this out!