# Route 53

Overview

• Route53 is a Managed DNS (Domain Name System)

• DNS is a collection of rules and records which helps clients understand how to reach a server through URLs.

• In AWS, the most common records are:

* [www.google.com](http://www.google.com) => 12.34.56.78 == A record (IPv4)
* [www.google.com](http://www.google.com) => 2001:0db8:85a3:0000:0000:8a2e:0370:7334 == AAAA IPv6&#x20;
* search.google.com => [www.google.com](http://www.google.com) == CNAME: hostname to hostname
* example.com => AWS resource == Alias (ex: ELB, CloudFront, S3, RDS, etc...)

### Diagram for A Record

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2FP5z2owq0q7OJGnk36Dww%2FScreenshot%202023-12-23%20at%2015.56.30.png?alt=media&#x26;token=fc870094-6db7-45ad-ab79-3562f83eab10" alt=""><figcaption></figcaption></figure>

### Routing Policies

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2Fuy8DAm9O3Sir1jQ36r8i%2FScreenshot%202023-12-23%20at%2015.58.20.png?alt=media&#x26;token=cc72b67b-77f8-46d5-bdc8-7224dc54be81" alt=""><figcaption></figcaption></figure>

<figure><img src="https://1722711354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwNXdoUkfmcozr29fRrfb%2Fuploads%2F7TPMjnPBOFJNyvQNKve8%2FScreenshot%202023-12-23%20at%2015.58.42.png?alt=media&#x26;token=f9b4bfa5-7550-4c70-9072-79fcc856b16b" alt=""><figcaption></figcaption></figure>
