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Nokia 4A0-205 Exam - Topic 6 Question 48 Discussion

Which of the following statements is true about chromatic dispersion (CD)?
C) Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.
A) Different channels have different bandwidth and this causes different CD performances.
B) The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.
D) The fiber attenuation introduces inter-channel interference.

Nokia 4A0-205 Exam - Topic 6 Question 48 Discussion

Actual exam question for Nokia's 4A0-205 exam
Question #: 48
Topic #: 6
[All 4A0-205 Questions]

Which of the following statements is true about chromatic dispersion (CD)?

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Suggested Answer: C

The CPB (Commissioning Parameter Builder) application is used to generate the commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1). The CPB application allows the user to create multiple commissioning files[1][2], which can be used to configure a variety of different features on the device. The CPB also allows users to view, edit and modify the commissioning files before they are uploaded to the device. The NSP (Network Service Platform) and EPT (Element Provisioning Tool) are used to manage the devices and network elements within the network, but do not generate commissioning files.


by Precious at Mar 09, 2025, 03:03 PM

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Bethanie
6 months ago
D seems off to me. Inter-channel interference is more about crosstalk, right?
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Tayna
6 months ago
Wait, I thought attenuation was the main issue, not just speed differences?
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Caprice
7 months ago
A is misleading. Bandwidth doesn’t directly cause CD.
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Veda
7 months ago
Totally agree with C! It’s all about the speed of light in the fiber.
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Peggie
7 months ago
I think C is the right one. Different wavelengths do travel at different speeds.
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Quentin
7 months ago
D sounds familiar, but I can't recall if fiber attenuation directly causes inter-channel interference.
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Margot
7 months ago
I practiced a question similar to this, and I think B is misleading because attenuation isn't the main cause of CD.
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Dallas
8 months ago
I'm not completely sure, but I feel like A is related to bandwidth issues, which could affect CD.
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Malika
8 months ago
I remember something about how different wavelengths travel at different speeds, so I think C might be the right answer.
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Page
8 months ago
I'm not too sure about this one. The wording of the options is a bit tricky. I'll have to review my notes on chromatic dispersion before deciding.
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Cammy
8 months ago
Okay, I've got this. The key is understanding that chromatic dispersion is caused by the different wavelengths traveling at different speeds in the fiber. I'm confident C is the correct answer.
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Carisa
8 months ago
Hmm, I'm a bit confused. I'm not sure if it's A or C. I'll have to think this through carefully.
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Desiree
8 months ago
This question seems straightforward. I think the answer is C - different wavelengths propagating at different speeds within the same media.
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Hershel
1 year ago
I'm torn between C and A. But I think C is the safer bet - different wavelengths traveling at different speeds is the crux of chromatic dispersion. Although, the idea of different channels having different bandwidths is kinda funny. Like, 'Hey, your red channel is hogging all the bandwidth!'
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Tora
1 year ago
Haha, true! It's like a traffic jam in the fiber optic cable with different colored cars!
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Dahlia
1 year ago
I'm leaning towards A actually. Different channels having different bandwidths sounds plausible.
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Stacey
1 year ago
Yeah, I agree. That's the main concept behind chromatic dispersion.
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Shawnee
1 year ago
I think C is the correct answer. Different colors traveling at different speeds is the key.
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Matthew
1 year ago
Definitely C. The other options are just trying to confuse us. Chromatic dispersion has to do with the wavelength-dependent propagation speeds, nothing else.
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Jacqueline
1 year ago
C is the clear winner here. The different wavelengths traveling at different speeds is the textbook definition of chromatic dispersion. No need to overthink this one.
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Mila
1 year ago
C) Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.
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Joseph
1 year ago
A) Different channels have different bandwidth and this causes different CD performances.
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Gail
1 year ago
I'm going with C as well. It's the only one that accurately describes the underlying physics behind chromatic dispersion. The other options are just off the mark.
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Vallie
1 year ago
I'm not sure, but I think it's A.
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Lucia
1 year ago
Option C sounds spot on to me. That's exactly what chromatic dispersion is all about - different wavelengths traveling at different speeds within the fiber. Simple and straightforward.
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Twanna
1 year ago
Chromatic dispersion can definitely impact the performance of different channels in a fiber optic system.
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Justine
1 year ago
It's interesting how the different wavelengths can affect the speed of light in the fiber.
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Celestine
1 year ago
That's right, different colors traveling at different speeds is what causes chromatic dispersion.
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Gaynell
1 year ago
I agree, option C is the correct statement about chromatic dispersion.
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Elenor
1 year ago
I agree with Sueann, different colors travel at different speeds.
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Sueann
1 year ago
I think the answer is C.
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