The Domain Name System (DNS) is a worldwide directory that maps names to addresses and vice versa. It also provides many other types of information about computing resources. Although the DNS operates largely hidden from view, the global Internet would not work without it.
This guide explains what DNS is, how it works, and how to build your own authoritative name server.
This is the first in a series of four DNS guides.
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domains, subdomains, domain records, mx records, cname records