by Administrator
29. June 2009 22:46
The Domain Name System (DNS) uses a hierarchical naming scheme known as domain
names. The mechanism that implements a machine name hierarchy for TCP/IP is called
DNS. DNS has two conceptual aspects: the first specifies the name syntax and rules
for delegating authority over names, and the second specifies the implementation of a
distributed computing system that efficiently maps names to addresses.
DNS is a protocol that can be used in different platforms. In the Internet, the domain
name space is divided into three different sections: generic domain, country domain and
inverse domain. A DNS server maintains a list of hostnames and IP addresses, allowing
computers that query them to find remote computers by specifying hostnames rather than
IP addresses. DNS is a distributed database and therefore DNS servers can be configured
to use a sequence of name servers, based on the domains in the name being looked for.
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Tags: dns