Route 53

How Route 53 models DNS as SDK resources - hosted zones, record sets, and routing policies - the change-batch mutation model, and why every write is asynchronous until it reaches INSYNC.

Hands-on Route 53 basics: create a hosted zone, add A and CNAME records with a change batch, list records, wait for INSYNC, and delete safely - all in both boto3 and AWS SDK v3.

The record types you write most - A, AAAA, CNAME, TXT, MX - and Route 53's alias records that point the zone apex at ELB, CloudFront, and S3 targets using the target's canonical hosted zone id.

Create a Route 53 private hosted zone bound to a VPC, add internal-only records, associate more VPCs and regions, and understand the enableDnsHostnames/enableDnsSupport prerequisites.

The Route 53 SDK habits that keep production DNS safe: idempotent UPSERT change batches, deliberate TTL strategy, waiting for INSYNC, health-checked routing, and alias records resolved at runtime.