DNS Records

• A DNS record is an entry stored in a DNS server.

• An AA (Authoritative Answer) record is not a DNS record type. Instead, AA is a flag (bit) in a DNS response. It indicates that the DNS server responding is authoritative for the queried domain.

• AA = 1: The answer came from the authoritative DNS server.

• AA = 0: The answer came from a non-authoritative source, such as a recursive resolver's cache.

Common Records

• A: Maps a domain to an IPv4 address.
• AAAA: Maps a domain to an IPv6 address.
• CNAME: Alias for another domain.
• MX: Mail server.
• NS: Specifies the authoritative name server.
• TXT: Stores text.