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7. DNS, Caching and Performance Optimization

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Amazon Route 53

Last edited 2 days ago by Kirtan Chavda
Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service. You can use Route 53 to perform three main functions in any combination: domain registration, DNS routing, and health checking.

Highly available and scalable Domain Name System (DNS) service.
Offers domain name registry, DNS resolution, and health checking of resources.
Can perform any combination of these functions.
Provides a worldwide distributed DNS service located alongside all edge locations.


Domain Registration and DNS Management:
When you register a domain with Route 53, it becomes the authoritative DNS server for that domain and creates a public hosted zone.
To make Route 53 the authoritative DNS for an existing domain without transferring the domain, create a Route 53 public hosted zone and change the DNS Name Servers on the existing provider to the Route 53 Name Servers.
Changes to Name Servers may take up to 48 hours to propagate due to DNS record Time To Live (TTL) values.
Domain transfer:
to Route 53 is possible only if the Top-Level Domain (TLD) is supported.
from Route 53 to another registrar can be done by contacting AWS support.
to another AWS account is possible, but it does not migrate the hosted zone by default (optional).
It is possible to have the domain registered in one AWS account and the hosted zone in another AWS account.

Technical Details and Management:
Primarily uses UDP port 53 but can use TCP.
AWS offers a 100% uptime SLA for Route 53.
Management access to Amazon Route 53 hosted zones can be controlled using IAM.
Default limit of 50 domain names can be increased by contacting support.
Private DNS is a Route 53 feature that provides authoritative DNS within VPCs without exposing DNS records to the Internet.
Private DNS and Registration:
Private DNS is a Route 53 feature allowing authoritative DNS within VPCs without exposing DNS records to the Internet.
Register new domain names with Route 53 using the AWS Management Console or API.

Route 53 Features:

Fully Qualified Domain Names (FQDNs):


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