Data center interconnect (DCI) solutions are used to link and transport traffic between data centers. Although data centers vary according to market segment, DCI between the largest data centers hosting thousands of servers requires terabits of optical transport. With the continued growth of data centers across all segments of the market, DCI is the fastest growing application for optical transport. However, as data centers and IT move to the cloud, new cloud DCI solutions are needed to enable all participants to take full advantage of the emerging cloud ecosystem. Private, virtual private, hybrid and public clouds all have unique benefits to offer and cloud DCI — also known as cloud interconnect — can help deliver those benefits whether they include control, flexibility, agility, security or lower costs.