All 7 Amazon Route 53 & DNS Management questions
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What is Amazon Route 53 and what is its primary purpose? What are the common DNS record types supported by Route 53, such as A, CNAME, and MX records? What is a Route 53 alias record, and how is it different from a standard CNAME record? How do Route 53 routing policies, such as weighted and latency based routing, affect how traffic is directed? How does Route 53 Resolver enable DNS resolution between a VPC and on premises networks? What is DNSSEC, and how does Route 53 support it to protect against DNS spoofing?
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What are Route 53 health checks, and how do they support failover routing?

Intermediate

Answer

Route 53 health checks continuously monitor the health of a specified endpoint, such as an application server or load balancer, by sending periodic requests and evaluating the response, and when combined with failover routing policy, Route 53 automatically stops sending traffic to an unhealthy primary resource and redirects it to a designated secondary resource instead, providing automated disaster recovery at the DNS level.
aws route53 create-health-check --caller-reference 2026-09-07 --health-check-config IPAddress=192.0.2.1,Port=80,Type=HTTP,ResourcePath=/health
Real-world example An e commerce platform configures a Route 53 health check against its primary region's load balancer, so if that region ever becomes unresponsive, DNS traffic automatically fails over to a secondary standby region without any manual intervention.

Common follow-ups: How often does Route 53 check the health of a monitored endpoint by default?;What happens if both the primary and secondary resources are marked unhealthy?

AWS Backup & Disaster Recovery;Amazon CloudFront & Content Delivery
All 7 Amazon Route 53 & DNS Management questions