(DNS) A general-purpose distributed, replicated, data query service chiefly used on Internet
for translating hostnames into Internet addresses. Also, the style of hostname
used on the Internet, though such a name is properly called a fully qualified domain name
. DNS can be configured to use a sequence of name servers, based on the domains in the name being looked for, until a match is found.
The name resolution client (e.g. Unix's gethostbyname() library function) can be configured to search for host information in the following order: first in the local hosts file
, second in NIS
and third in DNS. This sequencing of Naming Services is sometimes called "name service switching". Under Solaris
is configured in the file /etc/nsswitch.conf.
DNS can be queried interactively using the command nslookup
. It is defined in STD 13
, RFC 1034
, RFC 1035
, RFC 1591
is a common DNS server.
Info from Virtual Office, Inc. (http://virtual.office.com/domains.html).