AWS Certified Sysops Administrator Associate · Free Practice Question Medium
Question 44
An international media company is setting up a new service on AWS. The service is deployed across several AWS Regions groups of Amazon EC2 instances. These instances are launched using an Auto Scaling group and supported by an Application Load Balancer (ALB) per region. The company intends to deploy Amazon Route 53 for DNS operations. The DNS configuration should guide users towards the Region closest to them while also supporting automated failover.
Which combination of steps should a SysOps administrator adopt to ensure that Route 53 satisfies these requirements? (Select TWO.)
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A
Configure Route 53 DNS failover using a health check that monitors the private IP address of an EC2 instance within each Region.
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B
Implement Amazon CloudWatch alarms to track the health of the ALB in each Region and set up Route 53 DNS failover with a health check linked to these alarms.
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C
Create Amazon CloudWatch alarms to monitor the status of the EC2 instances in every Region, then configure Route 53 DNS failover by using a health check that monitors these alarms.
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D
Configure Route 53 to use geolocation routing. Specify the Regions associated with the infrastructure.
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E
Establish weighted routing in Route 53. Identify the continent, country, and state or province linked to the infrastructure.
Reveal correct answers
Correct answers: B, D
Explanation
This approach using CloudWatch alarms ensures that Route 53 directs traffic to healthy regions and provides automated failover if an ALB becomes unhealthy. Route 53 geolocation routing lets you choose where your traffic will be sent based on the geographic location of your users, thus meeting the requirement to direct users to the Region that is closest to them.
CORRECT: "Implement Amazon CloudWatch alarms to track the health of the ALB in each Region and set up Route 53 DNS failover with a health check linked to these alarms" is a correct answer (as explained above.)
CORRECT: "Configure Route 53 to use geolocation routing. Specify the Regions associated with the infrastructure" is also a correct answer (as explained above.)
INCORRECT: "Create Amazon CloudWatch alarms to monitor the status of the EC2 instances in every Region, then configure Route 53 DNS failover by using a health check that monitors these alarms" is incorrect.
While monitoring the health of the EC2 instances is generally a good practice, in this scenario, monitoring the health of the ALBs would be more beneficial, as they are responsible for distributing incoming application traffic across multiple targets, such as EC2 instances.
INCORRECT: "Configure Route 53 DNS failover using a health check that monitors the private IP address of an EC2 instance within each Region" is incorrect.
This solution does not provide failover at the region level, which is required by the question.
INCORRECT: "Establish weighted routing in Route 53. Identify the continent, country, and state or province linked to the infrastructure" is incorrect.
Weighted routing does not help in directing users to the region closest to them or providing automated failover.
References:
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html
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Discussion
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