is a hierarchical distributed naming
system for computers, services, or any resource connected to the Internet or a private network. It
associates various information with domain
names assigned to each of the participating entities.
The
Domain Name System distributes the responsibility of assigning domain names and
mapping those names to IP addresses by designating authoritative name servers for
each domain. Authoritative name servers are assigned to be responsible for
their supported domains, and may delegate authority over subdomains to other
name servers. This mechanism provides distributed and fault tolerant service
and was designed to avoid the need for a single central database.
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