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Exam N10-008 topic 1 question 265 discussion

Actual exam question from CompTIA's N10-008
Question #: 265
Topic #: 1
[All N10-008 Questions]

Two network technicians are installing a fiber-optic link between routers. The technicians used a light meter to verify the correct fibers. However, when they connect the fibers to the router interface, the link does not connect. Which of the following would explain the issue? (Choose two.)

  • A. They used the wrong type of fiber transceiver.
  • B. Incorrect TX/RX polarity exists on the link.
  • C. The connection has duplexing configuration issues.
  • D. Halogen light fixtures are causing interference.
  • E. One of the technicians installed a loopback adapter.
  • F. The RSSI was not strong enough on the link.
Show Suggested Answer Hide Answer
Suggested Answer: AB 🗳️
by JakeCharles at Jan. 7, 2023, 12:34 p.m.

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JakeCharles
Highly Voted 1 year, 7 months ago
Selected Answer: AB
A. They used the wrong type of fiber transceiver. B. Incorrect TX/RX polarity exists on the link.
upvoted 5 times
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Nisita
Most Recent 10 months, 3 weeks ago
Selected Answer: AB
Duplexing issues in a fiber-optic connection wouldn’t typically prevent light from being transmitted entirely.
upvoted 2 times
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scarceanimal
11 months, 3 weeks ago
Selected Answer: AB
AB, duplexing issues doesnt stop connections, but impacts the performance. Not C
upvoted 2 times
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famco
1 year, 4 months ago
It could be all three. Transceiver definitely. Wrong polarity absolutely. But a duplex issue also could be a cause. I hope halogen will not be an issue. I will go for transceiver and polarity
upvoted 1 times
Molongo
1 year, 3 months ago
If I'm not mistaken, duplexing issues won't prevent connections but will impact performance of the network. You're correct about halogen not being an issue as those only interfere with copper connections and not fiber.
upvoted 2 times
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StellarSteve
1 year, 5 months ago
Selected Answer: AB
A,B, all the way double rainbow across the sky
upvoted 3 times
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FreePrivacy
1 year, 5 months ago
I am here to shed some light, chatGPT's response: A. They used the wrong type of fiber transceiver. B. Incorrect TX/RX polarity exists on the link. These are the two possibilities that can explain the issue. If the technicians used the wrong type of fiber transceiver, the signal may not be transmitted and received properly, which could prevent the link from connecting. Additionally, if the TX/RX polarity is incorrect, the signal may not be transmitted and received properly, causing the link to fail.
upvoted 4 times
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233Matis
1 year, 6 months ago
Selected Answer: BC
B. Incorrect TX/RX polarity exists on the link. C. The connection has duplexing configuration issues. Incorrect TX/RX polarity and duplexing configuration issues are two common reasons why a fiber-optic link may not connect. When the polarity of the transmit (TX) and receive (RX) fibers are reversed, the link will not work because the data transmitted from one end will not be received by the other end. Duplexing configuration issues can occur if the transmit and receive rates on the two ends of the link are not set to match each other, causing communication problems. Halogen light fixtures and other sources of interference would not cause the fiber link to fail if it was properly installed and terminated, as fiber-optic cables are immune to electromagnetic interference. The use of the wrong type of fiber transceiver and the presence of a loopback adapter may also cause issues, but they are not as likely as incorrect polarity or duplexing configuration. The signal strength (RSSI) of the link would not impact its ability to connect, but could impact its performance once it is connected.
upvoted 4 times
jeanj
9 months, 2 weeks ago
even if the duplexing is wrong it will still work/ connect, it would just be slow
upvoted 1 times
perfectopaque
9 months, 1 week ago
Incorrect duplex configuration can indeed prevent a fiber-optic link from functioning properly. The duplex configuration refers to how communication occurs between two devices.
upvoted 1 times
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famco
1 year, 4 months ago
It is not about EMI that I was thinking about, but about light itself. Probably not a good reason.
upvoted 1 times
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C (25%)
B (20%)
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