SD-WAN (Software-Defined Wide Area Network) What is SD-WAN? Software-Defined Wide Area Network (SD-WAN) is a virtualised networking solution that uses software to manage and optimise wide-area network connections, improving flexibility and efficiency. Explanation SD-WAN enables businesses to prioritise traffic, use multiple connection types (e.g., MPLS, broadband), and centralise management for simplified network operations. Practical Example of SD-WAN A retail chain implements SD-WAN to connect its stores, enabling seamless communication while optimising costs by using broadband alongside MPLS links.