ANS-C01 Network Implementation Practice Question
A company is setting up a VPC with both public and private subnets. The private subnets need outbound internet access for software updates. Which component is required to enable this?
⚠ Common exam trap
Test-takers frequently confuse a NAT Gateway with an Internet Gateway, thinking a direct IGW route in the private subnet is acceptable, or they mistakenly believe VPC peering or VPN can provide transitive internet access without additional configuration.
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
✓
A NAT gateway in a public subnet.
A NAT gateway in a public subnet is required to enable outbound internet access for private subnets. The NAT gateway resides in a public subnet with an Internet Gateway (IGW) route, and private subnet route tables direct default traffic (0.0.0.0/0) to the NAT gateway's elastic network interface. This allows instances in private subnets to initiate outbound connections (e.g., for software updates) while preventing unsolicited inbound traffic from the internet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A NAT gateway in a public subnet.
Why this is correct
NAT gateway enables outbound internet for private subnets.
- ✗
A VPN connection to an on-premises network that has internet access.
Why it's wrong here
VPN is for private connectivity, not internet access.
- ✗
A VPC peering connection to a VPC that has internet access.
Why it's wrong here
VPC peering does not provide internet access transitively.
- ✗
An internet gateway attached to the VPC with a route in the private subnet's route table pointing to the internet gateway.
Why it's wrong here
Private subnets must use a NAT gateway for outbound internet; direct IGW route would make them public.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every ANS-C01 question from scratch — 1,621 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.