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The AAAA resource record, commonly referred to as "quad A," serves the purpose of mapping a domain name to a 128-bit IPv6 address.

This record is crucial for enabling browsers to land on the correct website when users enter the domain or subdomain in the address bar.

It differs from the A record, which is used for IPv4 addresses.

While all domains have one or more IPv4 addresses, not all of them have an associated IPv6 address.

Additionally, not all devices and users are configured to use IPv6, which makes the AAAA record essential for ensuring compatibility with the newer Internet Protocol Version 6.