ANS-C01 Network Design Practice Question
A company has a VPC with a public subnet and a private subnet. An EC2 instance in the private subnet needs to download patches from the internet. The company does not want to assign public IP addresses to the instance. Which combination of resources is required? (Choose TWO.)
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
✓
NAT Gateway in a public subnet
A NAT Gateway in a public subnet allows instances in private subnets to initiate outbound traffic to the internet. The private subnet's route table must have a default route (0.0.0.0/0) pointing to the NAT Gateway. An Internet Gateway is needed for the NAT Gateway to reach the internet, but the question asks for resources; the IGW is already implied. A VPC endpoint is for AWS services, not internet. A VPN connection is for on-premises connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VPN connection to the on-premises data center
Why it's wrong here
A VPN is not needed for internet access; it's for on-premises connectivity.
- ✓
NAT Gateway in a public subnet
Why this is correct
The NAT Gateway enables outbound internet traffic for instances in private subnets.
- ✗
VPC endpoint for Amazon S3
Why it's wrong here
A VPC endpoint is for private access to AWS services, not general internet access.
- ✓
Internet Gateway attached to the VPC
Why this is correct
The Internet Gateway is required for the NAT Gateway to access the internet.
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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.