During the deployment of a single-mode fiber optic link, a network technician suspects that the transposition of TX and RX has occurred because the endpoints are not communicating. What would be the BEST immediate step to confirm and address the suspected issue?
Use a light source or visual fault locator to check connectivity and orientation
Replace the single-mode fiber with a multimode fiber to verify link capability
Adjust adapter settings on the network interface cards at both ends
Review the system logs for errors on the fiber link interfaces