Basic Information
| Field | Details |
|---|---|
| English name | Amazon Route 53 |
| Full name | Amazon Route 53 |
| Chinese description | DNS、域名注册、健康检查与流量路由 |
| Japanese description | Amazon Route 53（DNS・ドメイン登録・ヘルスチェック・トラフィックルーティング） |
| Exam frequency | ⭐⭐⭐⭐⭐ |
| Often confused with | CloudFront / ELB / Global Accelerator |
In one sentence
AWS DNS service for domain registration, name resolution, health checks, and policy-based traffic routing.
Key points
- Route 53 translates domain names to endpoints and can register domains.
- Routing policies include simple, weighted, latency, failover, geolocation, geoproximity, and multivalue.
- Health checks can support failover decisions, but DNS caching affects change speed.
Exam takeaway
Route 53 chooses an endpoint; CloudFront caches content, and Global Accelerator routes traffic through the AWS global network.
Update: routing policies and hybrid DNS
- Weighted, latency, failover, geolocation, geoproximity, IP-based, and multi-value policies select DNS answers; they are not request-level proxies.
- An Alias can point the zone apex to supported AWS targets; a CNAME cannot be used at the apex.
- On-premises to AWS private DNS uses an inbound Resolver endpoint; AWS to on-premises uses an outbound endpoint plus Resolver rules.
- A health check affects answers only after association with a record or policy. Route 53 failover does not move existing connections or provide complete DR.