ISC2 CC Network Security Practice Question
Which two protocols operate at the Transport layer of the OSI model? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
TCP
TCP and UDP are the primary Transport layer protocols. IP is Network layer, Ethernet is Data Link, and HTTP is Application layer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
HTTP
Why it's wrong here
HTTP operates at the Application layer.
- ✓
TCP
Why this is correct
Correct. TCP is a Transport layer protocol.
- ✗
IP
Why it's wrong here
IP operates at the Network layer.
- ✗
Ethernet
Why it's wrong here
Ethernet operates at the Data Link layer.
- ✓
UDP
Why this is correct
Correct. UDP is a Transport layer protocol.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CC exam.