Which statement best describes an OTDR's primary use?

Which statement best describes an OTDR's primary use?

• A. It Measures Real-Time Network Traffic Load
• B. It Identifies Attenuation Along The Fiber And Location Of Faults
• C. It Replaces The Need For Visual Inspection
• D. It Tests Electrical Continuity Of Copper Wiring

Answer: (B)

An OTDR is used to characterize fiber optic links by sending a short optical pulse into the fiber and measuring the light that reflects back over time. By analyzing this backscatter versus distance, it shows how much signal loss occurs along each segment and pinpoint the exact locations of events such as splices, connectors, bends, or breaks. This makes it the best tool for identifying attenuation along the fiber and locating faults. It isn’t meant for measuring real-time network traffic, it doesn’t replace visual inspections of components, and it doesn’t test copper wiring for continuity, which are outside its optical testing scope.

An OTDR is used to characterize fiber optic links by sending a short optical pulse into the fiber and measuring the light that reflects back over time. By analyzing this backscatter versus distance, it shows how much signal loss occurs along each segment and pinpoint the exact locations of events such as splices, connectors, bends, or breaks. This makes it the best tool for identifying attenuation along the fiber and locating faults. It isn’t meant for measuring real-time network traffic, it doesn’t replace visual inspections of components, and it doesn’t test copper wiring for continuity, which are outside its optical testing scope.