- A
AWS::EC2::VPCEndpoint
Why wrong: Not for internet access.
- B
AWS::EC2::Route (pointing to InternetGateway)
Directs traffic to internet.
- C
AWS::EC2::RouteTable
Routes traffic.
- D
AWS::EC2::NatGateway
Why wrong: For private subnets, not public.
- E
AWS::EC2::InternetGateway
Provides internet connectivity.
Question 774 of 1,750
Three Resources Needed for Public Subnet Internet Access
This DOP-C02 practice question tests your understanding of configuration management and iac. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses AWS CloudFormation to deploy a VPC with public and private subnets. They want to ensure that the VPC has internet access for the public subnets. Which THREE resources must be included in the template?
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
✓
AWS::EC2::Route (pointing to InternetGateway)
Option B is correct because an AWS::EC2::Route resource that points to an InternetGateway is required to direct traffic from the public subnet's route table to the internet. Without this route, instances in the public subnet cannot send or receive traffic from the internet, even if an Internet Gateway is attached to the VPC.
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.
- ✗
AWS::EC2::VPCEndpoint
Why it's wrong here
Not for internet access.
- ✓
AWS::EC2::Route (pointing to InternetGateway)
Why this is correct
Directs traffic to internet.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
AWS::EC2::RouteTable
Why this is correct
Routes traffic.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS::EC2::NatGateway
Why it's wrong here
For private subnets, not public.
- ✓
AWS::EC2::InternetGateway
Why this is correct
Provides internet connectivity.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume an Internet Gateway alone is sufficient for internet access, forgetting that a route in the route table pointing to the IGW is mandatory to make the connection functional.
Detailed technical explanation
How to think about this question
Under the hood, an Internet Gateway performs 1:1 NAT for instances with public IPs, translating their private IPs to the public IP on the IGW. The route table must have a default route (0.0.0.0/0) pointing to the IGW for outbound traffic; inbound traffic is handled by the IGW responding to the destination public IP. In a real-world scenario, if you omit the route, the IGW is attached but useless—instances will have no path to the internet.
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.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS::EC2::Route (pointing to InternetGateway) — Option B is correct because an AWS::EC2::Route resource that points to an InternetGateway is required to direct traffic from the public subnet's route table to the internet. Without this route, instances in the public subnet cannot send or receive traffic from the internet, even if an Internet Gateway is attached to the VPC.
What should I do if I get this DOP-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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Last reviewed: Jul 4, 2026
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