What are patch cords primarily used for in fiber optics?

Patch cords in fiber optics serve the primary function of connecting various pieces of end equipment, such as routers, switches, and network interface cards, allowing data transmission over the optical medium. These cords are typically pre-terminated and ready to use, making it easy to establish connections in a variety of applications, from data centers to enterprise networks.

Their role is crucial because they simplify the process of connecting and disconnecting equipment, allowing for flexibility in network design and management. By providing a direct link between devices and network infrastructure, patch cords ensure efficient communication and facilitate network performance.

The other choices represent important aspects of fiber optics but do not capture the primary function of patch cords. Optical loss measurements and establishing maximum allowable loss are related to performance assessment of the network but not the direct connection provided by patch cords. Preparing fibers for termination involves a different process entirely, where fibers are cut, and connectors are applied, rather than connecting end devices.