ANS-C01 Network Implementation Practice Question
A company has a VPC with a public subnet and a private subnet. They want to allow instances in the private subnet to download patches from the internet. Which THREE components are required? (Select THREE.)
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that a NAT Gateway alone in a private subnet can provide internet access, but the NAT Gateway must be deployed in a public subnet with an Internet Gateway attached to the VPC and a default route pointing to the IGW in that public subnet's route table.
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
✓
Internet Gateway attached to the VPC
An Internet Gateway (IGW) is required to provide a target in the VPC's route tables for internet-bound traffic. The NAT Gateway must be deployed in a public subnet and assigned an Elastic IP address so that it can route traffic through the IGW to the internet. The private subnet's route table must have a default route (0.0.0.0/0) pointing to the NAT Gateway, enabling instances in the private subnet to initiate outbound connections to the internet for patch downloads while remaining inaccessible 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.
- ✗
AWS Direct Connect connection
Why it's wrong here
Direct Connect is for dedicated private connectivity, not internet access.
- ✓
Internet Gateway attached to the VPC
Why this is correct
The NAT Gateway uses the Internet Gateway to reach the internet.
- ✗
Elastic IP address assigned to the NAT Gateway
Why it's wrong here
While needed for a NAT Gateway in a public subnet, the question asks for required components; an EIP is part of NAT Gateway creation but not a separate component.
- ✓
Route in the private subnet's route table pointing 0.0.0.0/0 to the NAT Gateway
Why this is correct
This directs internet-bound traffic from private instances to the NAT Gateway.
- ✓
NAT Gateway deployed in the public subnet
Why this is correct
The NAT Gateway enables outbound internet for private instances.
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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.