After running new fiber optic cabling between two buildings, a network technician suspects that there may be signal loss that is causing decreased network performance. To verify the signal strength of the optical signal, which tool should the technician use and what is the main reason for using it?
Use an OTDR to identify and locate the exact length of the cabling.
Use a cable tester to assess the electrical continuity of the fiber.
Use a WiFi analyzer to check for interference from wireless signals.
Use a fiber light meter to measure the light power transmitted through the fiber.