What is a domain name?
Domain is part of the hierarchical space of the global Internet network, which has its own unique name (domain name), which must meet certain requirements.
Name must be unique within a domain, such as full name consists of names of all the domains from which it is part, separated by dots. For example, en.wikipedia.org. (with end point) means the third-level domain eb, which enters the second level domain wikipedia, which has been in top-level domain org, which enters into the root domain. The domain name serves as the addressing of the nodes of the network and the Internet along their network resources: (websites, mail servers and other services) in a convenient form for use by humans. Domains are made up mainly for the convenience of people as easily be remembered. To convert the domain name in the IP-address (which is important for the software) and back server system DNS.
This system consists of a hierarchical structure of DNS-servers, each responsible for one or more areas of the domain and responds to queries concerning this zone, but also from the DNS-resolver that meet the requests of any areas. Often the program also combines the functions of the holder of the zone and resolver, for example, such is the popular DNS-server BIND (Berkeley Internet Name Domain).
To ensure uniqueness and to protect the rights of the owners of the domain names 1st and 2nd level (and occasionally 3rd) may be used only after registering. Domain registration is done by authorized registrars. Information on the owner (administrator) of registiriranite domain names are made public. They can learn through service whois.
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