Definition
DNS (Domain Name System) is often called the 'phonebook of the internet.' When you type google.com, DNS resolves it to an IP address like 142.250.80.46. The resolution process involves recursive resolvers, root nameservers, TLD nameservers, and authoritative nameservers. Common DNS record types include A (IPv4), AAAA (IPv6), CNAME (alias), MX (mail), TXT (verification), and NS (nameserver).