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Question 789 - SAA-C03 discussion

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A company serves its website by using an Auto Scaling group of Amazon EC2 instances in a single AWS Region. The website does not require a database

The company is expanding, and the company's engineering team deploys the website to a second Region. The company wants to distribute traffic across both Regions to accommodate growth and for disaster recovery purposes The solution should not serve traffic from a Region in which the website is unhealthy.

Which policy or resource should the company use to meet these requirements?

A.
An Amazon Route 53 simple routing policy
Answers
A.
An Amazon Route 53 simple routing policy
B.
An Amazon Route 53 multivalue answer routing policy
Answers
B.
An Amazon Route 53 multivalue answer routing policy
C.
An Application Load Balancer in one Region with a target group that specifies the EC2 instance IDs from both Regions
Answers
C.
An Application Load Balancer in one Region with a target group that specifies the EC2 instance IDs from both Regions
D.
An Application Load Balancer in one Region with a target group that specifies the IP addresses of the EC2 instances from both Regions
Answers
D.
An Application Load Balancer in one Region with a target group that specifies the IP addresses of the EC2 instances from both Regions
Suggested answer: B

Explanation:

Amazon Route 53 Multivalue Answer Routing: This routing policy allows Route 53 to return multiple values, such as IP addresses, in response to DNS queries. This can distribute traffic across multiple resources and includes health checks to ensure traffic is only routed to healthy instances.

Health Checks:

Configure health checks for each Region to monitor the health of the website instances.

Route 53 will only include healthy instances in the DNS responses, ensuring that traffic is not routed to an unhealthy Region.

Load Distribution and Disaster Recovery:

Multivalue answer routing helps balance the load between instances in different Regions.

If instances in one Region become unhealthy, Route 53 will route traffic to the healthy instances in the other Region.

Operational Simplicity: This solution does not require complex configurations or additional resources, making it a simple yet effective way to distribute traffic and ensure high availability.

Amazon Route 53 Routing Policies

Multivalue Answer Routing

asked 16/09/2024
Manoj Balan
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