AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 361

A company hosts its application, example.com, behind Application Load Balancers in the us-east-1 and eu-west-1 Regions. Users should be routed to the resources geographically nearest to them. Users must not be routed to the application when it is considered unhealthy.
How should a network engineer configure Amazon Route 53 to route clients to example.com?

Answer options

• A. Configure latency.example.com to use a weighted routing policy that points to the load balancers, and associate an HTTP health check. Configure failover records for example.com. Point the primary alias record to latency.example.com, and enable the evaluate target health setting. Point the secondary record to a static HTML maintenance page hosted in Amazon S3.
• B. Configure latency.example.com CNAME latency-based records that point to the load balancers, and associate an HTTP health check. Configure failover records for example.com. Point the primary alias record to latency.example.com, and enable the setting used to evaluate target health. Point the secondary record to a static HTML maintenance page hosted in Amazon S3.
• C. Configure latency.example.com to use a geoproximity routing policy that points to the load balancers, and associate an HTTP health check. Configure failover records for example com. Point the primary alias record to latency.example.com, and enable the evaluate target health setting. Point the secondary record to a static HTML maintenance page hosted in Amazon S3.
• D. Configure latency.example.com alias latency-based records that point to the load balancers, enable the setting used to evaluate target health, and associate an HTTP health check. Configure failover records for example.com. Point the primary CNAME record to latency.example.com, and associate an HTTP health check. Point the secondary record to a static HTML maintenance page hosted in Amazon S3.

Correct answer: C

Explanation

The correct answer, C, is appropriate because it utilizes a geoproximity routing policy to direct users based on their location and ensures application health is checked. Options A and B incorrectly use weighted and CNAME records, while D does not specify a geoproximity routing policy, which is crucial for geographic routing.