Amazon Route 53
A scalable Domain Name System (DNS) web service for routing users to applications.
Amazon Route 53 is AWS’s authoritative DNS service that resolves domain names to IP addresses, but it goes well beyond basic resolution. It supports several routing policies — including latency-based, geolocation, geoproximity, weighted, failover, and multivalue answer — letting architects direct traffic based on network conditions, user location, or application health. Route 53 also performs health checks against endpoints and can automatically reroute traffic when a target becomes unhealthy. A common exam trap is confusing Route 53 with CloudFront: Route 53 handles DNS resolution and global traffic steering, while CloudFront caches and delivers content at edge locations. Route 53 also functions as a domain registrar, so a single service can register a domain, host its DNS zone, and enforce routing logic.
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