Once upon a time, that graybeard application we call email would have cracked the list of top bandwidth hogs. But although it might still cause productivity headaches, it has moved down the list of problem areas from a network perspective. "Email is now a distant bandwidth user. Whether we talk about [on-premises] or cloud-based solutions, email simply does not require the bandwidth that other types of applications require," said Bourque. "Even if email was the number-one data producer a few years ago, video is now king."