Modern data centers are no longer isolated facilities. Instead, they form large, distributed systems that operate across cities, regions, and even countries. As a result, DCI (Data Center Interconnect) has become a core technology for ensuring seamless communication between geographically separated data centers. This article explains what it is, why it matters, and how mainstream… Continue reading DCI and 400G WDM/OTN: A Practical Guide to Data Center Interconnection