Exin CDCP Exam - Topic 6 Question 27 Discussion

Actual exam question for Exin's CDCP exam

Question #: 27
Topic #: 6

[All CDCP Questions]

An optical fiber cable comes with the specifications 50/125 um.

What do the numbers represent?

AThe first number represents the distance for a 10 Gb/s connection; the second number represents the distance for a 1 Gb/s connection.

BThe first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.

CThe first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.

DThe first number represents the required distance to single-phase power cabling; the second number represents the required distance to three-phase cabling.

Show Suggested Answer

Suggested Answer: B

Optical fiber cables are composed of a core, a cladding, and a coating. The core is the central part of the fiber that carries the light signal. The cladding is the layer surrounding the core that reflects the light back into the core and prevents signal loss. The coating is the protective layer that covers the cladding and provides mechanical strength and environmental protection. The specifications of an optical fiber cable indicate the dimensions of the core and the cladding in microns (m), which are one millionth of a meter. For example, a 50/125 m cable has a core diameter of 50 m and a cladding diameter of 125 m. The coating diameter is usually 250 m, but it is not part of the specifications.

by Leanora at Oct 23, 2024, 05:01 PM

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Nieves

3 months ago

Core is 50 microns, cladding is 125 microns. Classic fiber spec!

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Craig

3 months ago

Definitely not about distances for connections, that's for sure.

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Estrella

3 months ago

Wait, are you sure about that? I thought it was something else.

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Nina

4 months ago

Totally agree, it's all about the core and cladding sizes!

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Elke

4 months ago

The first number is the core diameter, and the second is the cladding diameter.

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Fanny

4 months ago

I thought the numbers were related to data speeds, but now I'm leaning towards them being about the physical dimensions of the fiber.

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Magnolia

4 months ago

I practiced a question like this before, and I feel like the first number definitely refers to the core diameter. The second might be cladding, but I can't recall for sure.

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Rhea

4 months ago

I remember something about 50/125 um cables, and I think it has to do with core and cladding sizes. Option B sounds right to me.

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Tegan

5 months ago

I think the first number is about the core diameter, but I'm not sure if the second one is for cladding or something else.

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Terina

5 months ago

I'm not entirely sure about this one. The wording is a bit ambiguous, and I could see the numbers representing different things. I'll have to carefully consider each option before making a decision.

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Lynette

5 months ago

I'm confident that the numbers represent the core and cladding diameters. The 50/125 um specification is a common one for optical fiber cables.

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Lavonna

5 months ago

Okay, I think I've got this. The first number is the diameter of the core, and the second number is the diameter of the cladding, both in microns. That makes the most sense to me.

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Linsey

5 months ago

I'm a bit confused by this question. I'm not sure if the numbers represent distances, diameters, or something else. I'll have to think about this one carefully.

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Jodi

5 months ago

Hmm, this one seems pretty straightforward. I'm pretty sure the numbers represent the core and cladding diameters of the optical fiber.

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Tish

1 year ago

Wait, is this a trick question? I bet the answer is something weird, like the first number is the number of times you need to wrap the cable around a unicorn's horn to get the right refractive index. Just kidding, but this is definitely tripping me up.

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Irma

1 year ago

Oh, I see now. Thanks for the explanation!

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Erick

1 year ago

C) The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.

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Rashad

1 year ago

That makes sense, thanks for clarifying!

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Bettyann

1 year ago

B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.

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Dexter

1 year ago

Option B is the only one that makes sense. I bet the person who wrote this question is trying to trick us, but I'm not falling for it! This is basic fiber optic knowledge.

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Verlene

1 year ago

It's important to know these specifications when working with optical fiber cables.

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Evangelina

1 year ago

Yes, understanding the core and cladding sizes is crucial for proper installation and performance.

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Ryan

1 year ago

Definitely, the first number is the core diameter and the second number is the cladding diameter.

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Nydia

1 year ago

I agree, option B is the correct one.

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Rose

1 year ago

Hmm, I've heard of fiber optic cables, but the 50/125 thing is new to me. I wonder if it's like 50 miles/125 miles or something? Nah, that can't be right.

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Rachael

1 year ago

C) The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.

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Robt

1 year ago

B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.

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Lorean

1 year ago

A) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.

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Tenesha

1 year ago

I agree with Kaitlyn. The first number is for the core and the second number is for the cladding.

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Brock

1 year ago

The first number definitely refers to the core diameter, and the second to the cladding diameter. No way it's about connection speeds or power cabling distances.

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Aracelis

1 year ago

User 3: So the answer is B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.

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