What is Software-Defined Wide Area Network (SD-WAN)?
A software-defined wide area network (SD-WAN) is a wide area network that uses software components to control network operations. Dedicated management software virtualizes the network hardware in the same way that hypervisors and other components virtualize data center operations.
A wide area network is defined as a network that spans an extensive geographic area - as opposed to a local area network (LAN), which is typically isolated in a home or business office. The software control mechanism in SD-WAN is used to manage all of these different geographic parts of the wide area network to provide performance and efficiency to businesses and other stakeholders, among other things.
The SD-WAN usually helps these wide-area networks to cope with the network traffic with certain protocols and at the same time offers a user-friendly interface. They can also support features like firewalls, gateways, and virtual private network tools for privacy. An SD-WAN can also help with redundancy, backup, recovery, and troubleshooting.