Which property of fiber-optic cables reduces vulnerability to external interference?

Fiber-optic cables are designed to transmit data using light signals instead of electrical signals, which is a fundamental characteristic that grants them immunity to electromagnetic interference. This property is crucial, as electromagnetic interference can disrupt signals in conventional copper cables, causing data loss or degradation, particularly in environments with high levels of electrical noise.

Since fiber-optic cables carry light rather than electricity, they are not susceptible to external electrical fields, making them an excellent choice for installations near other electronic devices or in industrial settings. This attribute not only enhances the integrity of the data being transmitted but also allows fiber-optic systems to perform well over long distances without signal degradation.

The other aspects, such as insulation and weight, do play a role in the overall structure and maintenance of fiber-optic systems, but it is the immunity to electromagnetic interference that specifically addresses the vulnerability to external interference.