Definition
Amazon Route 53 is a highly available and scalable cloud Domain Name System (DNS) web service. It translates human readable domain names like www.example.com into the numerical IP addresses required for computers to connect to each other. Route 53 acts as a traffic director, routing user requests to the correct AWS resources or external websites. Understanding Route 53 is crucial for managing domain registration, DNS routing, and health checking of applications. For instance, it can direct traffic to an Elastic Load Balancer distributing requests across multiple EC2 instances. Unlike a simple DNS resolver, Route 53 offers advanced routing policies and health checks for improved reliability. This service is frequently tested on AWS certification exams like the AWS Certified Solutions Architect Associate.