AWS Certified Solutions Architect - Professional
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A company operates a high-traffic website with a backend service deployed in a primary AWS Region and a disaster recovery (DR) Region. They use a single Amazon CloudFront distribution for the website and have set up an Amazon Route 53 record set with health checks and a failover routing policy for the primary Region's backend service. This Route 53 record set is configured as an origin for the CloudFront distribution, with another record set pointing to the DR Region's backend service endpoint as a secondary failover. Both record sets have a TTL of 60 seconds. However, failover currently exceeds 1 minute. A solutions architect is tasked with designing a solution to minimize failover time. Which solution would achieve the fastest failover?
A
Deploy an additional CloudFront distribution and create a new Route 53 failover record set with health checks for both CloudFront distributions.
B
Reduce the TTL to 4 seconds for the existing Route 53 record sets used for the backend services in each Region.
C
Create new record sets for the backend services using a latency routing policy and use these record sets as origins in the CloudFront distribution.
D
Create a CloudFront origin group including two origins, one for each backend service Region, and configure origin failover as a cache behavior for the CloudFront distribution.