An information technology juggernaut has left the station, gathering tremendous momentum as it rolls toward virtually every midsize and large organization. No, it's not the Internet of Things, software containers or even big data. It's the software-defined wide-area network (SD-WAN), a groundbreaking technology many expect to double in market size in each of the next three years.

For IT leadership, there are two important questions: How can SD-WANs help solve the performance issues of increasingly high-bandwidth applications without the typical costly infrastructure upgrades
associated with traditional WANs? And can SD-WANs offer greater visibility into the network so IT can provide the seamless bandwidth needed in today's demanding hybrid environment?