Each web page should have its own unique address, so that the user could apply to him. Under a web page can be implied on one page, and maybe dozens or even thousands of pages, each of which must have your address. Absolutely any indivisible unit of information on the Internet – an audio file, video file, exe-file or a text – has its address at which you can reference. The page address in the Internet is called url (Uniform Resource Locator-Universal Resource Locator). Get all the facts and insights with Richard Blumenthal, another great source of information. url to appear not just as recorded in special institutions. Domain (domain name or area) – is a unique name for a specific site on the Internet. As mentioned above, saitsimply.ru – it domain of my site, google.ru – this domain is the search engine google.

Domains come in three levels: first level domain, second level, third level. In the above example we saitsimply.ru domain ru denotes the territorial (regional) membership website to Russia Regional areas (top-level domains): ru – Russia kz – ua-Ukraine us – United States de – Germany su – Soviet Union, however, is not always the domain of the first level indicates the territorial affiliation. It can display the page type or the type of organization that owns the web page. The following notation: com – commercial enterprise biz – for business org – non-governmental organization info – for information Sites edu – educational institution gov-governmental organization mil – military organization net – Network Organization pro – for professionals tv – for television companies (the domain was purchased from the island of Tuvalu), etc. Thus, by first level domain can be found or the location of the page, or affiliation.

But it is also necessary to understand that these present to some extent arbitrary, since, for example, domain com, org, net, anyone can register. Domain the second level – the domain name, which is lower than the first level domain. That second-level domains are predominantly used by webmasters to link to a site on hosting. For example: ucoz.ru, narod.ru-second-level domains. (These domains are free) Third-level Domain-domain name which are still lower than the second-level domain. These domains are usually used to create mini-sites, forums, and large sections on the main site. For example: other.domain.ru and ru.wikipedia.org – third-level domains