Networking terms such as software-defined networking (SDN), network function virtualization (NFV), virtual network function (VNF), autonomous networks, and Zero Trust (ZT) have become common vernacular among networking vendors that want to help organizations support a virtualized, mobile, and cloud world. These terms are popular in articles and with conference speakers, but many surveys, articles, and reports indicate that technology professionals are confused about what these terms mean and how they’re related. In this report, we define the terms and their relationships.