Which of the following is a common application for fiber optics?

Fiber optics is primarily used in computer networking due to its ability to transmit data at high speeds over long distances with minimal loss of signal. The technology utilizes light signals to carry data, which allows for a larger bandwidth compared to traditional copper cables. This high-speed data transmission is essential for various applications such as internet access, telecommunication systems, and data centers, where large volumes of data need to be shared quickly and efficiently.

In contrast, the other options highlight materials and methods that serve different purposes. Electrical wiring typically involves copper or aluminum conductors to transmit electrical power. Thermal insulation is utilized in construction to reduce the transfer of heat, and structural support uses materials like steel or concrete to provide stability and load-bearing capacity in buildings and other structures. These alternatives do not leverage the unique advantages of fiber optics, thereby distinguishing networking as its primary application.