New trends impact networking costs, which can already represent a significant portion of IT spending. Mobile devices and cloud computing as well as video viewing may drive network requirements to new and unseen levels. This report from Gartner forecasts changes to enterprise network capacity over the next five years by evaluating the impact of cloud, mobile, video and BYOD using a range of scenarios. This research will help network planners to understand the challenges and measure which kind of evolution is best practice.