ANS-C01 Network Design Practice Question
A company is designing a multi-Region application using Amazon Route 53 latency-based routing. The application must be highly available and failover automatically if an AWS Region becomes unavailable. What should the company do to meet these requirements?
⚠ Common exam trap
Test-takers frequently assume that simply enabling health checks with latency-based routing (Option A) is sufficient for automatic failover, but without explicitly configuring an active-passive failover policy, Route 53 does not have a defined secondary target to fail over to when all endpoints in a latency-based set become unhealthy.
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
✓
Configure active-passive failover with latency-based routing and associate health checks with each record.
It combines latency-based routing with health checks and active-passive failover, which allows Route 53 to route traffic to the region with the lowest latency under normal conditions and automatically fail over to the passive region if the active region's health check fails. This meets the high availability and automatic failover requirements by leveraging Route 53's DNS failover mechanism, which updates DNS responses based on health check status.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure latency-based routing with health checks and enable DNS failover.
Why it's wrong here
Latency routing alone does not provide failover; health checks must be associated with a failover record set.
- ✓
Configure active-passive failover with latency-based routing and associate health checks with each record.
Why this is correct
Correct: Active-passive failover with health checks and latency routing provides automatic regional failover.
- ✗
Configure geolocation routing policies and associate health checks.
Why it's wrong here
Geolocation routes by user location, not latency or health.
- ✗
Configure weighted routing policies with equal weights for all regions.
Why it's wrong here
Weighted routing does not consider health or latency for failover.
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Same concept, more angles
1 more way 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 deploying a global application with users in North America and Europe. The application runs on EC2 instances in us-east-1 and eu-west-1. To reduce latency, the company wants to route users to the nearest region and provide automatic failover. Which combination of AWS services should be used?
hard- A.Amazon CloudFront with origins in each region.
- B.AWS Global Accelerator with endpoint groups in each region.
- C.Amazon Route 53 with geolocation routing and health checks.
- ✓ D.Amazon Route 53 with latency-based routing and health checks.
Why D: Amazon Route 53 latency-based routing directs users to the region with the lowest latency, automatically routing traffic to the nearest region. Combined with health checks, if an endpoint fails, Route 53 automatically fails over to the next lowest-latency healthy endpoint, meeting both the latency reduction and automatic failover requirements.
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.