SAP-C02 Design for New Solutions Practice Question
A company is designing a new VPC for a web application that must be accessible from the internet. The application will run on EC2 instances in private subnets. Which TWO components are required to allow the EC2 instances to access the internet for updates?
⚠ Common exam trap
Many candidates assume an Internet Gateway alone suffices for all internet access, forgetting that instances in private subnets require a NAT device (NAT Gateway or NAT Instance) to translate their private IPs for outbound traffic.
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 route table in the private subnet with a default route pointing to the NAT Gateway
A route table in the private subnet with a default route (0.0.0.0/0) pointing to a NAT Gateway is required to direct outbound internet traffic from the EC2 instances to the NAT Gateway. The NAT Gateway then forwards this traffic to the Internet Gateway, enabling the instances to download updates 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.
- ✓
A route table in the private subnet with a default route pointing to the NAT Gateway
Why this is correct
The route table directs traffic to the NAT Gateway.
- ✗
An Internet Gateway attached to the VPC
Why it's wrong here
Internet Gateway is for public subnets, not for private subnets directly.
- ✓
A NAT Gateway in a public subnet
Why this is correct
NAT Gateway allows private instances to access the internet.
- ✗
VPC Flow Logs
Why it's wrong here
Flow Logs capture traffic metadata, not provide connectivity.
- ✗
A virtual private gateway
Why it's wrong here
Virtual private gateway is for VPN connections, not internet access.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 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 SAP-C02 exam.