Which type of cable transfers data using light and is used in fiber-optic networks?

Which type of cable transfers data using light and is used in fiber-optic networks?

• A. Fiber cables
• B. Coaxial cables
• C. Cat6a
• D. RJ45

Answer: (A)

Data is carried in fiber-optic networks by sending light through thin glass or plastic strands. The light is modulated to represent data and stays inside the fiber thanks to total internal reflection, allowing incredibly high bandwidths and long-distance transmission with minimal interference. This is what makes fiber cables the go-to choice for backbone and data-center networks. Coaxial cables rely on electrical signals on a copper conductor, which are more prone to electromagnetic interference and generally offer lower bandwidth over long distances. Cat6a is a copper twisted-pair Ethernet cable used for electrical signaling, not light. RJ45 is a connector standard used on Ethernet cables, not a type of transmission medium.

Data is carried in fiber-optic networks by sending light through thin glass or plastic strands. The light is modulated to represent data and stays inside the fiber thanks to total internal reflection, allowing incredibly high bandwidths and long-distance transmission with minimal interference. This is what makes fiber cables the go-to choice for backbone and data-center networks.

Coaxial cables rely on electrical signals on a copper conductor, which are more prone to electromagnetic interference and generally offer lower bandwidth over long distances. Cat6a is a copper twisted-pair Ethernet cable used for electrical signaling, not light. RJ45 is a connector standard used on Ethernet cables, not a type of transmission medium.