The main advantage of fiber-optic communication over copper is its superior speed and bandwidth capabilities. Fiber-optic cables transmit data using light signals, allowing for significantly higher data transfer rates and longer transmission distances without degradation. This technology supports larger volumes of data, making it ideal for high-speed internet and multimedia applications. Additionally, fiber-optic communication is more resistant to electromagnetic interference, enhancing reliability and performance in various environments. Overall, fiber optics provide a faster, more efficient solution for modern telecommunications compared to traditional copper wiring.