A network administrator tests a multimode fiber cable from end-to-end on a new link that is down
and notices that the dB loss is -.09. Which of the following is the MOST likely cause?

A.
TXRX reversed

B.
dB loss too high

C.
dB loss too low

D.
Bad connectors

Explanation:

Some Ethernet switches support medium dependent interface crossover (MDIX),which allows a
switch port to properly configure its leads as transmit (Tx) or receive (Rx) leads. You can
interconnect such switches with a straight-through cable (as opposed to a crossover cable).
However, if a network device does not support MDIX, it needs an appropriate cable (that is, a
crossover cable ) to allow its Tx leads to connect to the Rx leads on a connected device, and vice

versa.
Therefore, care must be taken when selecting cable types interconnecting network components.