ANS-C01 Network Management and Operations Practice Question
A company has a VPC with public and private subnets. The private subnets need internet access for software updates. The company wants to minimize costs and management overhead. Which solution should they use?
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
✓
Create a NAT gateway in a public subnet and add a route to the private subnet route table pointing to the NAT gateway
A NAT gateway deployed in a public subnet allows instances in private subnets to initiate outbound traffic to the internet for software updates while preventing inbound internet traffic, and it is a fully managed service requiring minimal overhead. Option A (VPC endpoints) only provides access to specific AWS services like S3 and CloudFront, not general internet. Option B (attaching an IGW and adding a default route to private subnets) would make the private subnets effectively public, allowing unsolicited inbound connections and violating security best practices. Option D (NAT instance) requires manual configuration, patching, and scaling, increasing management overhead compared to a NAT gateway.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a VPC endpoint for S3 and CloudFront
Why it's wrong here
Not for general internet access.
- ✗
Attach an internet gateway to the VPC and add a default route to the private subnet route table pointing to the internet gateway
Why it's wrong here
Internet gateway requires public IPs.
- ✓
Create a NAT gateway in a public subnet and add a route to the private subnet route table pointing to the NAT gateway
Why this is correct
Managed service, low overhead.
- ✗
Launch a NAT instance on an EC2 instance in a public subnet
Why it's wrong here
Requires management.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
Related to this question
About these practice questions
This ANS-C01 question is part of Courseiva's 1,621-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.