SAP-C02 Design for New Solutions Practice Question
A company is designing a new microservices architecture using Amazon ECS with Fargate. Each service must be isolated within its own VPC and communicate via AWS PrivateLink. The company expects variable traffic and wants to minimize costs. Which solution meets these requirements?
⚠ Common exam trap
Test-takers frequently assume VPC peering or Transit Gateway is required for cross-VPC communication, but PrivateLink is the only option that enforces strict VPC isolation while minimizing costs for variable traffic patterns.
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
✓
Use separate VPCs per service and create VPC endpoint services for each.
AWS PrivateLink allows services in separate VPCs to communicate privately without exposing traffic to the public internet. By creating a VPC endpoint service in each service's VPC and configuring Network Load Balancers, each microservice remains isolated in its own VPC, meeting the isolation requirement while minimizing costs by avoiding NAT gateways or Transit Gateway attachments.
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 separate VPCs and connect them via VPC peering with NAT gateways.
Why it's wrong here
NAT gateways are unnecessary for PrivateLink and increase cost.
- ✗
Deploy all services in a single VPC with security groups to isolate traffic.
Why it's wrong here
Single VPC does not provide network isolation at the VPC level.
- ✓
Use separate VPCs per service and create VPC endpoint services for each.
Why this is correct
VPC endpoints provide isolated, private connectivity without extra cost.
- ✗
Use a single VPC with Transit Gateway to route between services.
Why it's wrong here
Transit Gateway adds cost and complexity without providing isolation.
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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.