Lessons Learned: Choosing Between Single-Mode and Multimode Fiber in Data Center Projects

Aug 29, 2025 · 2 min read · When Single-Mode Saved a Project A few years ago, I was working on a financial data center migration. The original plan was to reuse the existing multimode OM2 cabling. On paper, it looked fine for 10G. But when the client asked for 40G uplinks betwe...