Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 36 discussion

C is correct. https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/high_availability_origin_failover.html

Option C provides an automated, resilient, and low-maintenance solution using S3 CRR and CloudFront origin groups to meet the requirement of multi-Region resiliency with the least operational overhead.

C. Configure replication on the S3 bucket in us-east-1 to replicate objects to the S3 bucket in the second Region. Set up an Amazon CloudFront distribution with an origin group that contains the two S3 buckets as origins.

Why not D ? D. Configure replication on the S3 bucket in us-east-1 to replicate objects to the S3 bucket in the second Region. If failover is required, update the application code to load S3 objects from the S3 bucket in the second Region: Manual Failover: This option involves manual updates to the application code in the event of a failover, which adds operational overhead and complexity. CloudFront provides automatic failover and load balancing, making it a more streamlined solution.

C IS THE answer

C is correct

Straightforward

Option C is the most efficient solution because it leverages S3’s built-in replication feature to automatically replicate objects to a second bucket in another Region, ensuring that the data is resiliently stored across multiple Regions. By using Amazon CloudFront with an origin group containing both S3 buckets, the application benefits from CloudFront’s global content delivery network, which improves load times and provides a built-in failover mechanism. This setup minimizes operational overhead while achieving the desired resiliency and performance improvements. Option C provides a seamless, automated solution for achieving resiliency across multiple AWS Regions with minimal operational effort, leveraging AWS services designed for replication, content delivery, and failover.

C is correct because, You can server Dynamic Websites with Static Content with CDN by having origins for both and in your webserver app refer to DNS for s3 origin from CF to deliver static content. For webserver on EC2 (Custom Origins can be used). So in above scenario, if you would like to have resiliency. Add another S3 Origin with bucket in different region. Create Origin Group with both S3 Origins. Set priority on Origins and select 4XX and 5XX error codes for failover. You can use DNS returned for Origin Group from Cloud front in your web app and that would do automatic failover with least overheads. D also solves the purpose, but you will need to build failover mechanism in your app. However, with above Cloudfront Origin group is taking care of that for you.

All options does the job, but: A would require code maintenance and managing public hosted zone -> No B would require Lambda and CloudFront operations -> No C would require only CloudFront operations -> Yes D requires a lot of work for failover that appears to be manual -> No

C is mostly correct, A is not correct - B and D required the code changes. C will take care of the cloud front orgin failover.

C is good

obvious

Here's why Option C is the most suitable choice: Replication: Amazon S3 Cross-Region replication is designed to replicate objects from one S3 bucket to another in a different Region. This ensures data resiliency across Regions with minimal operational overhead. Once configured, replication happens automatically. CloudFront: Setting up an Amazon CloudFront distribution with an origin group containing the two S3 buckets allows you to use a single CloudFront distribution to serve content from both Regions. CloudFront provides low-latency access to your content, and using an origin group allows for failover if one of the S3 buckets becomes unavailable.

C, LEAST operational overhead

C should incur the least operational cost while D still requires the cx to update the code in whatever way they deem as appropriate

Selected Answer: C