For more information about DNS, please refer to:
- RFC 1034: DOMAIN NAMES – CONCEPTS AND FACILITIES (https://tools.ietf.org/html/rfc1034)
- RFC 1035: DOMAIN NAMES – IMPLEMENTATION AND SPECIFICATION (https://tools.ietf.org/html/rfc1035)
- RFC 3596: DNS Extensions to Support IP Version 6 (https://tools.ietf.org/html/rfc3596)