CV0-004 Security Practice Question
A cloud architect is designing a security group for a web server in AWS. The server must receive HTTPS traffic from the internet. What is the most secure inbound rule?
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
✓
Allow HTTPS from 0.0.0.0/0
Security groups are stateful; specifying source IP range 0.0.0.0/0 for HTTPS is typical for public web servers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Allow HTTPS from the VPC CIDR only
Why it's wrong here
This would block internet traffic.
- ✗
Allow HTTPS from 10.0.0.0/8
Why it's wrong here
10.0.0.0/8 is private IP range, not internet.
- ✗
Allow all traffic from 0.0.0.0/0
Why it's wrong here
This is overly permissive and insecure.
- ✓
Allow HTTPS from 0.0.0.0/0
Why this is correct
This allows all inbound HTTPS traffic, which is standard for public web servers.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 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 CV0-004 exam.