Which type uses glass or plastic threads to transfer data using light instead of electricity?

Which type uses glass or plastic threads to transfer data using light instead of electricity?

• A. Fiber cables
• B. Coaxial cables
• C. Cat5e
• D. RJ45

Answer: (A)

Optical fiber cables transmit data as light through glass or plastic strands. The light carries encoded information, guided along the fiber by total internal reflection, and is converted back to electrical signals at the receiving end. This medium supports very high bandwidth and long-distance links and is immune to electromagnetic interference. The other options rely on electrical signals over copper (coaxial and Cat5e) or are just a connector (RJ45), so they don’t use light to transfer data.

Optical fiber cables transmit data as light through glass or plastic strands. The light carries encoded information, guided along the fiber by total internal reflection, and is converted back to electrical signals at the receiving end. This medium supports very high bandwidth and long-distance links and is immune to electromagnetic interference. The other options rely on electrical signals over copper (coaxial and Cat5e) or are just a connector (RJ45), so they don’t use light to transfer data.