Which of the following is a typical fiber testing method?

OTDR testing, which stands for Optical Time-Domain Reflectometry, is a widely used method for testing fiber optic cables. This technique involves sending a series of light pulses down the fiber and measuring the time it takes for each pulse to reflect back. By analyzing the reflected signals, technicians can determine various characteristics of the fiber, such as loss, faults, and the overall integrity of the installation.

OTDRs effectively provide a visual representation of the fiber, allowing for accurate identification of any issues, such as breaks or bends in the cable, and helping to quantify attenuation levels at different segments of the fiber. This testing method is crucial during installation, maintenance, and troubleshooting processes in fiber optic networks, ensuring optimal performance and reliability.

The other options listed do not directly apply as common testing methods for fiber optics. While signal amplification testing pertains to verifying the effectiveness of amplifiers in a network, and connector polish testing can be crucial in ensuring the quality of fiber optic connections, these methods do not encompass the comprehensive testing capabilities offered by OTDRs. Network redundancy testing refers to assessing backup systems and does not focus on the performance of fiber cabling itself. This distinction clarifies why OTDR testing is the typical and preferred method for fiber optic testing.