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APICS CPIM-8.0 Exam - Topic 2 Question 28 Discussion

At which Open Systems Interconnection (OSI) layer does User Datagram Protocol (UDP) function?
C) Layer 4
A) Layer 1
B) Layer 2
D) Layer 3

APICS CPIM-8.0 Exam - Topic 2 Question 28 Discussion

Actual exam question for APICS's CPIM-8.0 exam
Question #: 28
Topic #: 2
[All CPIM-8.0 Questions]

At which Open Systems Interconnection (OSI) layer does User Datagram Protocol (UDP) function?

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Suggested Answer: C

by Jennie at Jul 15, 2026, 10:21 AM

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An
3 days ago
UDP operates at Layer 4, the Transport layer.
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Tommy
9 days ago
I’m pretty confident it’s Layer 4, but I wonder if they could trick us with a question about other protocols.
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Dorian
14 days ago
Layer 4 sounds right for UDP, but I keep mixing it up with Layer 3 sometimes.
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Maryann
19 days ago
I remember practicing a question about TCP and UDP, and I think both are at Layer 4. So, I’d go with C.
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Goldie
24 days ago
I think UDP operates at Layer 4, but I’m not entirely sure if it’s the same for all transport protocols.
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