Nokia Exam 4A0-255 Topic 7 Question 60 Discussion

Actual exam question for Nokia's 4A0-255 exam

Question #: 60
Topic #: 7

[All 4A0-255 Questions]

Which of the following best describes Four Wave Mixing (FWM)?

AFWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.

BFWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

CFWM is a non-linear impairment resulting from varying velocities at different frequencies.

DFWM is a linear impairment resulting from pulses broadening over ultra-long distances

Show Suggested Answer

Suggested Answer: A

by Casie at Feb 10, 2025, 10:45 PM

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1 days ago

I don't know, these optical terms can be tricky. I'll have to remember that FWM is a non-linear thing involving wavelength interactions.

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5 days ago

I'm not sure, but I think it's either B or C. Can someone explain the difference between the two options?

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7 days ago

I agree with Stevie, because FWM occurs due to non-linear effects in the fiber.

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9 days ago

B) sounds right to me. Non-linear effects like FWM can create new wavelengths that interfere with the original signals.

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14 days ago

I think the answer is B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

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