ISC2 CC Network Security Practice Question
Which protocol operates at the Transport layer of the OSI model and is connectionless and unreliable?
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
✓
UDP
UDP is connectionless and does not guarantee delivery, making it fast but unreliable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
TCP
Why it's wrong here
TCP is connection-oriented and reliable.
- ✗
HTTP
Why it's wrong here
HTTP is an application layer protocol.
- ✗
IP
Why it's wrong here
IP operates at the Network layer.
- ✓
UDP
Why this is correct
UDP is connectionless and unreliable.
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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.