A network technician receives a call from a user stating that a newly installed fiber link connecting two office buildings will not come up. The fiber installer is onsite and has certified the fiber link meets the user’s requirements. The network technician arrives onsite, consoles into the switches, and confirms the switch configuration is correct. The network technician then performs a physical inspection of both the fiber patch cabling and transceivers, and confirms they are correctly matched. Which of the following MOST likely the cause of this issue?
A. dB loss
B. Tx/Rx reversed