
AWS Certified Advanced Networking – Specialty (ANS-C01) Certification Guide
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This is where Route 53 begins to add value over a basic DNS service. Route 53 provides a standard DNS service, then it layers additional features and functionality. Features introduced, including alias records, public hosted zones, private hosted zones, routing policies, Route 53 Resolver, rule-based conditional forwarding, and health checks, will be revisited with a deeper dive in Chapter 8, AWS Route 53: Advanced.
Alias records are a proprietary extension to DNS that enables Route 53 to route traffic to AWS resources including but not limited to S3 buckets, load balancers, VPC interface endpoints, CloudFront distributions, and Elastic Beanstalk. The benefit is that the alias records automatically respond to changes in the underlying resources. For example, if the public IP address of a load balancer changes, Route 53 will return the correct IP address without operator intervention.
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