GregLab | Exam Prep

Networking and Content Delivery

Amazon Route 53

Amazon Route 53 provides authoritative DNS, domain registration, health checks, and traffic-routing policies. It gives GenAI applications stable names and can steer clients across regional API endpoints.

Key points

  • Alias records integrate with supported AWS resources
  • Weighted, latency, failover, and geolocation policies serve different routing goals
  • Health checks affect configured DNS answers rather than moving application state

When to use it

  • Fail over an assistant API between approved Regions
  • Use weighted records during a regional gateway canary

Exam tips

  • Choose Route 53 for DNS routing and Global Accelerator when static anycast IPs and faster health-based network steering are needed
  • Respect DNS caching and ensure state or data is available before shifting traffic

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