DNS (domain names server) gives out the information for computers how to search each other through the Internet. When you type the address in your browser, your provider (ISP - Internet Service Provider) checks it through a server of domain names (DNS), to know where to send your request.
http://www.domain.com---> check in DNS---> DNS informs domain.com = address 192.168.0.1---> you receive site contents.
Logic knot in a names tree. The right to administer a zone can to be transferred the third parties, because of this database distribution is provided. Thus the person who has transferred the right to control the database stores the information only about zone existence (but not subzones!), the information about the person (organisation) operating a zone and the address of servers which are responsible for a zone. All other information is stored on the servers responsible for a zone.
The zone name in system of domain names (DNS) of the Internet, allocated for some country, organization or for other purposes. The structure of a domain name reflects a sequence of zones in a hierarchical style; the domain name is read from the left to the right from younger domains to highest level domains (as importance increase), the root domain of all system is the dot ('. '), domains of the first level (geographical or thematic), then - domains of the second level, the third and so on. (For example, for en.domainc.com address the domain of the first level - com, the second - domain, the third - en). In practice a point in the end of a name often lower, but sometimes it is important in division cases between relative domains and FQDN (Fully Qualified Domain Name, completely certain name of the domain).
A name of the subordinated zone. (For example, domain.com - a subdomain of com domain, and en.domain.com - the subdomain of domain.com). Theoretically such division can reach 127 levels depth and each label can contain 63 symbols maximum while the total length together with dots will not reach 254 symbols. But in practice registrars of domain names use more strict restrictions.
Defines the IP-address for the specified name. It shows a physical arrangement of a site. In virtual hosting the number of sites will have one IP-address, And the same time the number of servers can be adhered to one name (for example for loading balancing).
Fixing of DNS servers which serving the given domain. Addresses of DNS-servers are specified in a symbolical style, and specified as primary and secondary servers. For increase search speed of the server in DNS system there are used primary and secondary servers in different domains because they have various call time and conformity tables (website name/IP) updating speed.
Necessary record for the domain in which the various extra information is underlined - DNS manager's e-mail, a name primary (authorial) DNS-server of this zone, the information updating period.
Specifies server for e-mail reception, coming on addresses in the specified domain (like
). If on the domain MX-record is not registered, the SMTP-server directs request for definition of the domain IP-address (A-record) and mail goes on this IP-address.
Allows to appropriate pseudonym to a host. Record represents the reference to other domain name (link with A-record). This reference is used instead of A-record with the real IP-address and allows connecting number of domain names with one real host on which site pages are stored, for example.
