N10-005 · Question #170
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?
The correct answer is A. TXRX reversed. 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)…
Question
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?
Options
- ATXRX reversed
- BdB loss too high
- CdB loss too low
- DBad connectors
How the community answered
(26 responses)- A65% (17)
- B8% (2)
- C23% (6)
- D4% (1)
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 Therefore, care must be taken when selecting cable types interconnecting network components.
Topics
Community Discussion
No community discussion yet for this question.