Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 242 discussion

Use a multivalue answer routing policy to help distribute DNS responses across multiple resources. For example, use multivalue answer routing when you want to associate your routing records with a Route 53 health check. For example, use multivalue answer routing when you need to return multiple values for a DNS query and route traffic to multiple IP addresses. https://aws.amazon.com/premiumsupport/knowledge-center/multivalue-versus-simple-policies/

The Multivalue routing policy allows Route 53 to respond to DNS queries with multiple healthy IP addresses for the same resource. This is particularly useful in scenarios where multiple instances are serving the same purpose and need to be load balanced or failover capable. With the Multivalue routing policy, Route 53 returns multiple IP addresses in a random order to distribute the traffic across all healthy instances. Option A (Simple routing policy) would only return a single IP address in response to DNS queries and does not support returning multiple addresses. Option B (Latency routing policy) is used to route traffic based on the lowest latency to the resource and does not fulfill the requirement of returning all healthy IP addresses. Option D (Geolocation routing policy) is used to route traffic based on the geographic location of the user and does not fulfill the requirement of returning all healthy IP addresses. Therefore, the Multivalue routing policy is the most suitable option for returning the IP addresses of all healthy EC2 instances in response to DNS queries.

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html#routing-policy-multivalue "Multivalue answer routing policy – Use when you want Route 53 to respond to DNS queries with up to eight healthy records selected at random. You can use multivalue answer routing to create records in a private hosted zone." Company requires that the IP addresses of "ALL" healthy EC2 instances be returned so C is the only option.

Use a multivalue answer routing policy to help distribute DNS responses across multiple resources. For example, use multivalue answer routing when you want to associate your routing records with a Route 53 health check. For example, use multivalue answer routing when you need to return multiple values for a DNS query and route traffic to multiple IP addresses.

Use Multivalue answer routing policy when you want Route 53 to respond to DNS queries with up to eight healthy records selected at random.

C. Multivalue routing policy

A. Deploy an AWS Storage Gateway file gateway as a virtual machine (VM) on premises at each clinic

multivalue supports health checks

IP are returned RANDOMLY for multi-value Routing, is this what we want ?

Multivalue answer routing policy ...answer is C

Answer is C

Should be C

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