Deploy a Wide Area Network (WAN) that uniquely fits your business iStock The perfect WAN? Network technology is constantly evolving. You have more choices than ever when evaluating how to connect your offices, locations, data centers, and remote users. One of the keys to deploying an optimal Wide Area Network (WAN) that uniquely fits your business is understanding the vast array of underlay and overlay options. Underlay offers connection or transport types such as Multiprotocol Label Switching (MPLS), internet, dedicated internet, fiber, and wireless broadband. Overlay options include Edge devices such as traditional IP routers, software based white boxes, and the vast array of software-defined WAN (SD-WAN) appliances.