Which DNS record maps a domain to an IPv6 address?

Which DNS record maps a domain to an IPv6 address?

• A. A
• B. AAAA
• C. MX
• D. CNAME

Answer: (B)

In DNS, different record types map a domain to different kinds of destination data. The record type that stores an IPv6 address is the AAAA record (often read as “quad-A”). It directly resolves a domain to its IPv6 address, such as 2001:0db8:85a3:0000:0000:8a2e:0370:7334. By contrast, an A record maps a domain to an IPv4 address, MX specifies the mail server with priority, and CNAME creates an alias to another domain name rather than an IP. Having an AAAA record enables IPv6 connectivity, while A handles IPv4; many domains publish both to support dual-stack environments.

In DNS, different record types map a domain to different kinds of destination data. The record type that stores an IPv6 address is the AAAA record (often read as “quad-A”). It directly resolves a domain to its IPv6 address, such as 2001:0db8:85a3:0000:0000:8a2e:0370:7334. By contrast, an A record maps a domain to an IPv4 address, MX specifies the mail server with priority, and CNAME creates an alias to another domain name rather than an IP. Having an AAAA record enables IPv6 connectivity, while A handles IPv4; many domains publish both to support dual-stack environments.