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Exin CDCS Exam - Topic 3 Question 22 Discussion

Actual exam question for Exin's CDCS exam
Question #: 22
Topic #: 3
[All CDCS Questions]

What is the main advantage of using an End-of-Row (EoR) design?

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Suggested Answer: C

EoR centralizes access/aggregation switches at the end of each row, reducing the number of access switches compared with ToR (one per rack), which simplifies management and often lowers Ops costs.

A, D are incorrect generalizations.

B is a characteristic (housing EoR switches in a dedicated cabinet) but not the key advantage.


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by Goldie at Nov 20, 2025, 01:40 PM

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Glenna
3 days ago
I thought ToR switches were more efficient though?
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Monroe
8 days ago
Wait, are EoR switches really cheaper overall?
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Johnna
13 days ago
Totally agree, less complexity is always better.
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Youlanda
18 days ago
Fewer switches to manage is a big plus!
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Raelene
24 days ago
Haha, who needs more switches to manage? I'll take the EoR design any day!
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Junita
29 days ago
C) Fewer switches to manage? Sign me up! I'd rather spend my time on more important tasks.
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Lavera
1 month ago
D) A ToR switch has only optical interfaces? Wow, I didn't know that. Sounds like a real limitation.
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Luisa
1 month ago
I thought EoR was beneficial because it centralizes management, but I might be mixing it up with other designs.
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Lawana
1 month ago
I feel like the cost comparison between ToR and EoR switches was mentioned in class, but I can't recall the details.
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Una
2 months ago
I remember practicing a question about switch management, and I think EoR designs help simplify that.
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Cecily
2 months ago
I think the main advantage is about managing fewer switches, but I'm not entirely sure if that's the only reason.
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Audrie
2 months ago
Ah, I see. The key is identifying the main advantage, not just any advantage. I think C is the strongest answer here, but I'll review my notes to make sure I'm not missing anything.
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Lettie
2 months ago
The question is asking about the main advantage, so I need to focus on which option provides the biggest benefit. I'm leaning towards C, but I'll double-check the other choices just to be sure.
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Tawanna
3 months ago
C) There will be fewer switches to manage, which means less headache for the IT team.
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Remedios
3 months ago
A) A single Top-of-Rack (ToR) switch is more expensive than an EoR switch? That's a no-brainer, right?
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Thea
3 months ago
Hmm, I'm not sure about this one. The options don't seem very clear to me. I'll have to think it through carefully.
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Kirk
3 months ago
I think the main advantage is that there are fewer switches to manage, so that seems like the best answer.
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Carman
2 months ago
I agree, fewer switches mean less hassle.
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Margo
3 months ago
Makes sense, less equipment to monitor.
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