Which record type is specifically used to link a domain name to an IPv6 address?

The appropriate record type used to link a domain name to an IPv6 address is the AAAA Record, also known as Quad A Record. This type of record specifically serves to provide a mapping between a domain name and its corresponding IPv6 address.

In the context of the Domain Name System (DNS), IPv4 addresses are linked to domain names using Address Records (A Records). However, as the internet evolved and the need for more address space grew, the use of IPv6 became necessary, which utilizes a different addressing scheme. This is where AAAA Records come into play, enabling the resolution of domain names to IPv6 addresses.

It is essential to understand that while other record types serve different purposes, they do not perform the function of linking domain names directly to IPv6 addresses. For example, Canonical Name Records (CNAME) point one domain name to another, Mail Exchange Records (MX) are used for directing email to the appropriate server, and A Records link domain names to IPv4 addresses. Thus, AAAA Records specifically fulfill the role of associating domain names with IPv6 addresses, making them the correct choice in this scenario.