In enterprise networking, no concept has received as much attention as that of software-defined networking (SDN.) This flurry of interest is a result of SDN’s promise to address the scale issues, interoperability challenges, and management frustrations that have resulted from decades of network evolution. This brief is the cornerstone in a series that will offer an in-depth analysis of the approaches being proposed or followed in the cloud and the enterprise today. Learn more about the SDN movement.