The correct answer is to deploy a NAT Gateway in a public subnet and update the private route tables to point to it. This configuration works because a NAT Gateway, assigned an Elastic IP and placed in a public subnet, allows EC2 instances in private subnets to initiate outbound traffic to the internet for tasks like downloading updates, while blocking any unsolicited inbound connections. As a fully managed AWS service, it eliminates the need for patching or scaling, directly addressing the requirement for minimal administrative overhead. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of high-availability outbound connectivity with low operational burden; a common trap is choosing a NAT instance instead, which requires manual management. Remember the memory tip: "NAT Gateway is managed, NAT instance is manual"—if the goal is zero admin overhead, always pick the Gateway.
SOA-C02 Networking and Content Delivery Practice Question
This SOA-C02 practice question tests your understanding of networking and content delivery. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has a VPC with public and private subnets across two Availability Zones. An application running on EC2 instances in the private subnets needs to access the internet for updates. Which configuration should be used to provide internet access while minimizing administrative overhead?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy a NAT Gateway in a public subnet and update private route tables to point to it.
Option C is correct because a NAT Gateway, deployed in a public subnet with an Elastic IP, allows instances in private subnets to initiate outbound traffic to the internet (e.g., for updates) while preventing inbound traffic from the internet. This is a fully managed AWS service, so it requires no patching or scaling management, minimizing administrative overhead. The private subnet's route table must have a default route (0.0.0.0/0) pointing to the NAT Gateway's network interface.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Assign public IP addresses to the private instances and update route tables accordingly.
Why it's wrong here
Public IPs on private instances expose them to internet and are not standard practice.
✗
Set up AWS Direct Connect to an internet gateway.
Why it's wrong here
Direct Connect is for private connectivity, not internet access.
✓
Deploy a NAT Gateway in a public subnet and update private route tables to point to it.
Why this is correct
NATGateway is a managed service that provides outbound internet for private instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
Launch a NAT instance in the private subnet and configure routing.
Why it's wrong here
NAT instance requires more maintenance and is not fully managed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse a NATGateway with a NAT instance, assuming both require similar administrative effort, or they mistakenly think assigning public IPs to private instances is sufficient for outbound-only internet access.
Detailed technical explanation
How to think about this question
A NATGateway operates at the network layer (Layer 3) by translating the source IP of outbound packets from private IPs to its Elastic IP, using stateful connection tracking to return responses to the correct instance. It supports up to 5 Gbps of bandwidth and automatically scales up to 45 Gbps, whereas a NAT instance is limited by its instance type and requires custom scripts for high availability. The NAT Gateway must be placed in a public subnet with a route to an Internet Gateway, and the private subnet's route table must have a 0.0.0.0/0 entry pointing to the NAT Gateway's ID.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Networking and Content Delivery — This question tests Networking and Content Delivery — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy a NAT Gateway in a public subnet and update private route tables to point to it. — Option C is correct because a NAT Gateway, deployed in a public subnet with an Elastic IP, allows instances in private subnets to initiate outbound traffic to the internet (e.g., for updates) while preventing inbound traffic from the internet. This is a fully managed AWS service, so it requires no patching or scaling management, minimizing administrative overhead. The private subnet's route table must have a default route (0.0.0.0/0) pointing to the NAT Gateway's network interface.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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