The fiber optic link represents the highest level that the current data transmission technology can take, designed to transport information at light speed.Its basic functions include internet signal transmission, telecommunication and high-speed data streaming.Technological features of the fiber-optic link include its glass or plastic fibers, which are very thin, and its ability to carry light beams that are coded as data.This is possible because of the principle total internal reflection, which ensures minimum signal loss over long distances and therefore gives advantage to fiber-optic lines in terms of energy conservation and maintenance expenses.Such characteristics make fiber optics suitable for a wide variety of applications, from high-speed internet to cable TV and remote surgical procedures. This demonstrates their adaptability and vital role in present-day communications.