hardMultiple ChoiceObjective-mapped
CV0-004 Practice Question: Uses a cloud-based infrastructure with multiple…
An organization uses a cloud-based infrastructure with multiple VPCs peered together. The security team notices that traffic between VPCs is not being inspected by the central firewall. What design change should be implemented to ensure all inter-VPC traffic passes through a centralized firewall?
⚠ Common exam trap
It's easy for candidates to confuse VPC peering (which allows direct, non-inspected traffic) with a transit VPC (which forces traffic through a central inspection point), or they mistakenly think network ACLs or VPC endpoints can provide centralized traffic inspection.
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
✓
Set up a transit VPC with a firewall appliance and route traffic through it
A transit VPC architecture uses a centralized hub VPC containing a firewall appliance (e.g., a next-generation firewall) and routes all inter-VPC traffic through it via VPC peering or VPN connections. By configuring route tables in each spoke VPC to point the destination CIDR of other VPCs to the transit VPC's firewall, every packet between VPCs is forced through the firewall for inspection, ensuring compliance with security policies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use VPC endpoints for all inter-VPC communication
Why it's wrong here
VPC endpoints are for accessing AWS services, not for routing traffic between VPCs.
- ✗
Apply network ACLs to all subnets in each VPC
Why it's wrong here
Network ACLs are stateless and not designed for application-level inspection.
- ✓
Set up a transit VPC with a firewall appliance and route traffic through it
Why this is correct
A transit VPC acts as a hub, routing all inter-VPC traffic through a central firewall for inspection.
- ✗
Implement VPC peering between all VPCs and attach a firewall to each VPC
Why it's wrong here
This does not centralize inspection; traffic would still flow directly between peered VPCs.
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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.