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WGU Network and Security Foundation Exam - Topic 3 Question 15 Discussion

What is the TCP/IP layer that includes the User Datagram Protocol (UDP)?
D) Transport
A) Application
B) Network or internet
C) Physical or network access

WGU Network and Security Foundation Exam - Topic 3 Question 15 Discussion

Actual exam question for WGU's Network and Security Foundation exam
Question #: 15
Topic #: 3
[All Network and Security Foundation Questions]

What is the TCP/IP layer that includes the User Datagram Protocol (UDP)?

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Suggested Answer: D

The Transport layer in the TCP/IP model includes the User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). UDP is a connectionless protocol used for fast, lightweight data transmission where reliability is not the priority (e.g., video streaming, VoIP).

Application layer handles end-user services but not transport mechanisms.

Network or internet layer deals with IP addressing and routing, not UDP.

Physical or network access layer concerns hardware transmission methods.


by Clemencia at Jul 17, 2026, 02:19 AM

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Gerry
1 day ago
100% D) Transport, no doubt about it!
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Jesse
6 days ago
Wait, are you sure? I always mix up the layers.
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Alton
11 days ago
Yeah, D) Transport makes the most sense.
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Jannette
17 days ago
I thought it was A) Application at first!
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Kelvin
22 days ago
It's definitely D) Transport.
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Kate
27 days ago
I definitely recall that UDP is not in the Physical layer, so it must be either Application or Transport.
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Theresia
1 month ago
I’m a bit confused; I thought UDP was in the Application layer, but now I’m leaning towards Transport.
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Charisse
1 month ago
I remember practicing a question about TCP and UDP, and I think both are in the same layer.
upvoted 0 times
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Madonna
1 month ago
I think UDP is part of the Transport layer, but I’m not completely sure.
upvoted 0 times
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