ABSTRACT
Therefore, it was a significant event in April 2012 when Urs Hölzle, Google’s senior vice president of technical infrastructure and a Google Fellow, gave a presentation at the Open Networking Summit in Santa Clara, California (Hölzle, 2012). During his presentation, Hölzle stunned his audience by revealing that Google had built and was using a network based on software-defined networking (SDN) to interconnect its data centers. At the time of Google’s initial implementation, there were no commercial vendors or products available for purchase. Google’s engineers had created everything they used.
