CLO-002 Governance Risk Compliance And Security Practice Question
An administrator needs to ensure that only authorized traffic enters a private subnet. Which network component should be configured as a first line of defense?
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
✓
Network ACL
Network ACLs act as a subnet-level firewall, providing the first layer of security for traffic entering or leaving a subnet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NAT Gateway
Why it's wrong here
A NAT Gateway allows outbound traffic but is not primarily a security filtering tool.
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Security Group
Why it's wrong here
Security Groups are instance-level firewalls; Network ACLs are subnet-level.
- ✓
Network ACL
Why this is correct
ACLs provide subnet-level traffic control.
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Route Table
Why it's wrong here
Route tables direct traffic, they do not filter it based on security rules.
Visual reference
About these practice questions
One of 211 original CLO-002 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CompTIA exam blueprint
This CLO-002 practice question is part of Courseiva's free CompTIA 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 CLO-002 exam.