Before the introduction of HTML and HTTP, other protocols such as File Transfer Protocol and the gopher protocol were used to retrieve individual files from a server.
These protocols offer a simple directory structure which the user navigates and chooses files to download.
Web pages, which are the building blocks of websites, are documents, typically composed in plain text interspersed with formatting instructions of Hypertext Markup Language (HTML, XHTML).
They may incorporate elements from other websites with suitable markup anchors.
Web pages are accessed and transported with the Hypertext Transfer Protocol (HTTP), which may optionally employ encryption (HTTP Secure, HTTPS) to provide security and privacy for the user.
The user's application, often a web browser, renders the page content according to its HTML markup instructions onto a display terminal.
Hyperlinking between web pages conveys to the reader the site structure and guides the navigation of the site, which often starts with a home page containing a directory of the site web content.
Some websites require user registration or subscription to access content.Examples of subscription websites include many business sites, parts of news websites, academic journal websites, gaming websites, file-sharing websites, message boards, web-based email, social networking websites, websites providing real-time stock market data, as well as sites providing various other services.As of 2016, end users can access websites on a range of devices, including desktop and laptop computers, tablet computers, smartphones and smart TVs.The page you requested could not be found on our web server.This is usually caused by a error in the web request; however, it could also be caused by a problem on our server.If you know what the request should be, please check it and correct it if necessary.