The correct answer is Multivalue routing policy.

Amazon Route 53s Multivalue routing policy is specifically designed for scenarios where you want DNS to return multiple valuestypically IP addressesassociated with healthy resources. It also integrates optional health checks, so only healthy IPs are included in the response. This allows client-side load balancing by returning up to eight healthy records per query, making it the best match for the scenario where all healthy EC2 IPs need to be included in DNS responses.

Simple routing policy returns a single value, without regard for health status or multiple endpoints. It cannot meet the requirement to return all healthy IPs.

Latency routing policy directs traffic to the Region with the lowest latency based on the user's location. It is used for performance optimization, not for returning all healthy endpoints.

Geolocation routing policy responds to DNS queries based on the geographic location of the user making the request. It does not return multiple IPs nor does it focus on endpoint health.

Why this question matters: It tests your understanding of Amazon Route 53 routing policies and their appropriate use cases. Knowing the differences between policies such as Simple, Latency, Geolocation, and Multivalue is critical in designing DNS strategies that balance availability, performance, and user experience.

Tip: When a question mentions returning multiple healthy IP addresses or performing basic client-side load balancing through DNS, Multivalue routing is often the correct choice.

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