SD-WAN eBooks These in-depth eBooks analyses the current state of the software-defined wide access network (SD-WAN). Here is a list of all the SDxCentral sponsored SD-WAN eBooks. eBook: SD-WAN Strategies for 2018 This eBook looks at the growing interest in SD-WAN as well as some of the challenges end-users may encounter when migrating to an SD-WAN environment. Download today. eBook: SD-WAN as a Managed Service Download now to learn the latest on the SD-WAN as a managed service.