ANS-C01 Network Design Practice Question
A company is designing a network for a global application that requires low latency between users and application servers. They plan to use multiple AWS regions and want to route users to the nearest healthy endpoint. Which THREE services should they use together? (Select THREE.)
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that a single service (like CloudFront or Route 53 alone) can solve global latency, but the correct answer requires combining three complementary services—CloudFront for caching, Route 53 for DNS-based routing, and Global Accelerator for network path optimization—to fully address the requirement of routing users to the nearest healthy endpoint.
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
✓
Amazon CloudFront
Amazon CloudFront is correct because it provides a global content delivery network (CDN) that caches static and dynamic content at edge locations, reducing latency by serving users from the nearest edge. It integrates with AWS origins (like ALBs) and can route requests to the closest healthy origin, supporting low-latency delivery for global applications.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Amazon CloudFront
Why this is correct
Correct: Caches content at edge, reducing latency.
- ✓
Amazon Route 53 with latency-based routing
Why this is correct
Correct: Routes to nearest region based on latency.
- ✓
AWS Global Accelerator
Why this is correct
Correct: Provides static anycast IP and fast failover.
- ✗
AWS WAF
Why it's wrong here
Wrong: WAF is a web application firewall.
- ✗
Application Load Balancer in each region
Why it's wrong here
Wrong: ALB is regional, not global.
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Same concept, more angles
2 more ways this is tested on ANS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is designing a global application that will serve users across North America and Europe. The application consists of a static website hosted on Amazon S3, a REST API hosted on Amazon API Gateway, and a backend application running on EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The company wants to minimize latency for users by serving content from the closest AWS region. They also want to ensure high availability and automatic failover if a region becomes unavailable. The company is considering using Amazon Route 53 with a latency-based routing policy. However, they are concerned about DNS caching and propagation delays during failover. Which additional service should they use to improve the failover experience and provide a single endpoint for users?
hard- A.Use a Network Load Balancer in each region and configure Route 53 with failover routing
- B.Use Amazon CloudFront with multiple origins pointing to the S3 bucket and the ALB in each region
- C.Use Lambda@Edge to dynamically route traffic based on the user's location
- ✓ D.Use AWS Global Accelerator to provide a static IP address and route traffic to the ALB in the closest healthy region
Why D: AWS Global Accelerator uses the AWS global network to route traffic to the closest healthy endpoint via the Anycast static IP addresses, bypassing DNS caching and propagation delays. It provides a single fixed endpoint for users and integrates with the ALB in each region, automatically failing over to the next healthy region within seconds when health checks fail.
Variation 2. A company is designing a network for a high-traffic web application that must be highly available across multiple AWS Regions. The application uses Application Load Balancers (ALBs) in each region. Which TWO actions should be taken to route traffic to the nearest healthy endpoint?
medium- A.Use Amazon Route 53 weighted routing
- ✓ B.Use Amazon Route 53 latency-based routing with health checks
- C.Use Amazon Route 53 multi-value answer routing
- ✓ D.Use AWS Global Accelerator with endpoint groups in each region
- E.Use Amazon Route 53 failover routing
Why B: Route 53 latency-based routing directs traffic to the region with the lowest latency for the end user, and when combined with health checks, it ensures traffic is only sent to healthy ALBs. This meets the requirement of routing to the nearest healthy endpoint across multiple AWS Regions.
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.