About DNS records:
- 1. DNS resolves a domain name to its corresponding IP address.
- 2. Common record types:
- (1) A: maps to an IPv4 address.
- (2) AAAA: maps to an IPv6 address.
- (3) CNAME: alias to another domain.
- (4) MX: mail exchanger record.
- (5) TXT: text data (e.g., verification, SPF).