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Exin CDCP Exam - Topic 1 Question 5 Discussion

Actual exam question for Exin's CDCP exam

Question #: 5
Topic #: 1

[All CDCP Questions]

Which of statements below is true?

ASingle-mode cabling can use both LED and laser as a light source.

BSingle-mode cabling is more expensive than multi-mode cabling.

CMulti-mode cabling can cross longer distances.

DMulti-mode cabling is more expensive than single-mode cabling.

Show Suggested Answer

Suggested Answer: B

Single-mode cabling and multi-mode cabling are two types of fiber optic cables that differ in their core diameter, wavelength, light source, bandwidth, distance, and cost. Single-mode cabling has a smaller core diameter and uses a laser as a light source, which enables it to transmit data over longer distances and higher bandwidths. However, single-mode cabling is also more expensive than multi-mode cabling, because it requires more precise alignment and splicing, and more costly light sources and connectors. Multi-mode cabling has a larger core diameter and uses LEDs or VCSELs as a light source, which makes it cheaper and easier to install and maintain. However, multi-mode cabling also has a shorter distance and lower bandwidth than single-mode cabling, because it suffers from more modal dispersion and attenuation.

1: Data Center Cabling: Single Mode vs Multimode Fibers2, page 1, section 1 3: Single Mode vs Multimode Fiber Cable Guide4, page 1, section 1 5: Single-Mode vs. Multi-Mode Fiber Cables: Explained6, page 1, section 1 7: 2 Types of Fiber Optic Cable: Single Mode vs. Multimode Fiber8, page 1, section 1

by Andra at Feb 13, 2024, 10:34 AM

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Nobuko

9 months ago

B is spot on, single-mode costs more for sure!

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Abraham

9 months ago

A is wrong, single-mode only uses lasers.

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Jennifer

10 months ago

Wait, I thought multi-mode was cheaper?

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Beckie

10 months ago

I agree, multi-mode can't go as far as single-mode.

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Marleen

10 months ago

B is true, single-mode is definitely pricier.

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Teddy

10 months ago

I practiced a similar question, and I think multi-mode cabling is cheaper, which makes me doubt option D.

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Herschel

10 months ago

I feel like multi-mode cabling is better for shorter distances, but I can't recall the specifics.

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Stevie

11 months ago

I remember studying that single-mode is generally more expensive than multi-mode, so I might lean towards option B.

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Francene

11 months ago

I think single-mode cabling only uses lasers, but I'm not entirely sure about the LED part.

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Lenna

11 months ago

Ah, I remember learning about this in class. I'm confident I can select the right answer.

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Johana

11 months ago

I'm a bit confused on the details here. I'll need to re-read the question and options closely.

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Magda

11 months ago

Okay, let me review what I know about fiber optic cabling. I think I can figure this out.

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Aron

11 months ago

Hmm, I'm not too sure about the differences between single-mode and multi-mode cabling. I'll have to think this through carefully.

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Sarina

11 months ago

This question seems straightforward, I think I can handle it.

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Lourdes

11 months ago

This looks like a straightforward question about HPE OneView tools. I'm pretty confident I know the right answer here.

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Myong

11 months ago

Hmm, I think a phased migration might be the safest bet here. That way we can move things over gradually and minimize disruption.

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Bernardo

11 months ago

Okay, I've got this. The key is limited liability and privacy of the constitution. That rules out sole traders and general partnerships. So it's between a limited liability partnership and a company limited by shares. I'll go with A.

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Dorthy

11 months ago

Hmm, I'm a little unsure about this one. I know there are some command-line tools for comparing code, but I'm not super familiar with them. I might try option D, "Run the tf diff command," and see if that works.

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Mammie

11 months ago

I vaguely recall multiple AES standards, but can't remember if 100AES was ever a thing. I think it's between the 128 or maybe the 40 option.

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Peggie

2 years ago

I agree with option B, single-mode cabling is known to be more expensive due to the precision required in manufacturing.

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Harley

2 years ago

I think C makes more sense because multi-mode cabling is typically used for shorter distances.

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Ming

2 years ago

I remember studying that it's actually A) Single-mode cabling can use both LED and laser as a light source.

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Martina

2 years ago

I'm pretty sure it's D) Multi-mode cabling is more expensive than single-mode cabling.

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Leota

2 years ago

I disagree, I believe the answer is C) Multi-mode cabling can cross longer distances.

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Annice

2 years ago

I think the answer is B) Single-mode cabling is more expensive than multi-mode cabling.

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