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Route53 (Routing Policies (Weighted Routing (you can set health check on…

- - - - is the last word in a domain name (.com.vn, .uk), the last second word is second level domain name, optional (.com.vn)
      - are controlled by Internet Assigned Numbers Authority (IANN)
    - - is an authority that can assign domain names directly under one or more TLD
      - popular registrars: Amazon, GoDaddy.com ...
    - - name of the server
      - administrator of the zone
      - current version or data file
      - default number of seconds for TTL file on resources records
    - - are used by TLD Servers to direct traffic to others, for ex: user type abc.com to browser -> .com TLD (172800 IN NS ns.awsdns.com) -> NS Records -> SOA (contains DNS records)
    - - A Records (Address Records)
        
        Translate name of domain name to IP address
      - CNAME (Canonical Name)
        
        resolve one domain name to another (ex http://m.abc.com is used for when user browse to your domain name on mobile)
      - Alias Records
        
        map resource records set in your hosted zone to ELB, CloudFront distributions, or S3 that are configured as website.
        
        work like CNAME record in that you can map one DNS name (www.abc.com) to another 'target' name (elb123.elb.aws.com). Different: CNAME cant be used for naked domain names (zone apex record - without www, for ex http://abc.com), must be A Record or Alias