Fiber optic infrastructure is the physical backbone of modern communications: cables, splice points, terminals, and transport equipment that move data as light pulses. It is valued for speed, distance, and low signal loss, which makes it central to telecom, cloud, and enterprise networks. In newer sensing models, the same fiber can also carry measurements about vibrations, reflections, or other physical changes along the route.
In cyber security, fiber matters because it is both a critical asset and a potential sensor platform. Attackers may target it to disrupt service, tap traffic, or hide sabotage in ducts, cabinets, or shared facilities. Defenders use it for resilient backhaul, perimeter monitoring, and distributed sensing, but only if access control, integrity monitoring, and governance are strong. When fiber is reused for observation, privacy, retention, and audit controls become part of the security design.