C- "We are excited to announce the release of DNS Failover for Route 53, Amazon’s Domain Name System (DNS) web service. With DNS Failover, Amazon Route 53 can help detect an outage of your website and redirect your end users to alternate locations where your application is operating properly..." https://aws.amazon.com/about-aws/whats-new/2013/02/11/announcing-dns-failover-for-route-53/
Amazon Route 53 is a highly available and scalable domain name system (DNS) web service provided by AWS. It can be used to detect an outage of website servers and redirect users to alternate servers or locations when the primary servers become unavailable. Route 53 offers a feature called "DNS Failover" that automatically routes traffic from an unhealthy endpoint to a healthy one based on health checks that you configure. This helps ensure high availability and resiliency for web applications and websites.
C. Amazon Route 53
Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service. It can be used to detect an outage of a company's website servers and redirect users to alternate servers through the use of health checks and failover routing policies. It can also be used to route users to the optimal location for faster content delivery using geographic routing.
The Answer is C.
Route53 has Global Health Checking Functionality. Apart from the Single-Value Mode, Route53 will always return records which are healthy.
CloudFront helps to deliver the data and helps against DDoS attacks. It will not help with health/status checks.
https://aws.amazon.com/cloudfront/
C. Route 53 is the correct answer
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