Exam N10-007 topic 1 question 413 discussion

Fiber is immune to EMI so A is incorrect. C and D also pertain to copper cables, so the correct answer should be B.

This is a hideous insult to basic networking concepts. True fiber uses light and is immune to EMI for the most part. I'm seriously starting to doubt the authenticity of this website and its administrators for not fact checking a site that is suppose to prepare you for an official certificiation.

Option B, “TX/RX reverse”, refers to a situation where the transmit (TX) and receive (RX) fibers are reversed during recent work on the switches. This could prevent the proper operation of the network.

B, C and D have no sense. A however does. Fiber is immune to EMI but the SPF module located close to the source of EMI is not immune. Inside the SPF module there are semiconductors and circuits which can be affected by EMI. To protect the SPF module from EMI, technicians can place an SPF cage which will play the role of a shield.

a cable runs behind a fridge there is no specification for what type of cable so it is EMI 1000sx sfp does not mean is fiber could be something else

Good Lord this is a horrible question...

While they do mention fiber, its not in reference to the cable that runs behind the refrigerator.

Fiber is immune to EMI from the refrigerator. So the BEST answer is B TX/RX reverse.

LX is immune to EMI... so B

Ridiculous answer here. B is correct

A? Fiber should be unaffected by EMI. Whattup?

I am going with B as well. Makes the most sense.

has anyone taken the Comptia Network + exam and this was one of the questions and they answered EMI and got it correct. this does not make any sense to me

I really hope I don’t get some of these questions. I mean really.

Indeed, the question does not exactly specify what type of cable is run behind the industrial refrigerator. Therefore, the answer (A) is correct assuming that the cable conforms to a UTP specification.

The fibre connections to the switch use transceivers and it sounds like the switches arent far from the EMI interference so therein lies the problem. None of the other answers can apply since its a fibre cable.

CompTIA questions and answer aren't always going to make sense. The key is to eliminate all the they answers provided. The question says, "Which of the following is (MOST) likely the issue". By reading the question, we can eliminate attenuation and short off top. The question also states, "users can ping each other and the switch", meaning all cable connections are good. TX/RX reverse can't possibly be the issue, leaving answer A, EMI. I honest don't think its fair how they design their questions. We all are familiar with each answer and know exactly what they are but the way the questions are set up is deceitful and a lot times they can be vague.