3.3 : internet services

WWW (World Wide Web)

 The latest is an information service on the Internet. After the advent of the 1993rd The present multi-tens of millions of web pages is a synonym for the Internet. The first two words 'World Wide' mean global distribution, and the last word 'Web' means in this context of network computing. Scope of diverse content on the WWW servers is constantly growing. Almost everything can be found. Since the purchase of the product, technical support, advice, research papers, advertisements, price lists and who knows what all, depending on the site designated for and inspiration of their creator. So there are useful and useless, beautiful and ugly, organized and unorganized. Their development today is the extraordinary artistic and programming disciplines.

WWW is a graphical hypertext way of using the Internet using the HTTP protocol for transmitting Web pages and other information over the Internet, in principle, between the server and the user's computer. Web pages are written in HTML (Hypertext Markup Language) language, and recognizes them for this purpose designed browser (Internet Explorer, Firefox, ...). Service provides hypertext links between documents and combined display of text, images, sound and video, that enables the integration of different information content. Hypertext is a document or a system with related text units according to the principle shown in the following figure.

Electronic Mail (E-mail)

Service which is much earlier than the World Wide Web and has won hearts of the users. The idea that in a few minutes you can deliver, text, image, audio or video recording of any person on the planet was unfeasible until recently, but now, thanks largely to the rapid expansion of the number of Internet users and the increasing       speed of communication, was to become reality of business and social communication. Mainly used for the contents of up to 500 kB. Otherwise need to use the FTP service.

FTP (File Transfer Protocol)

Before the World Wide Web and FTP was the only way to transfer large files between computers of Internet users. Allows access to a computer on the Internet (if it's public or available to the password), preview content on its hard disk, finding the necessary files and copy on its own disk. This Internet service is not as simple as the World Wide Web, but it is very useful.

File transfer function is increasingly taking the WWW, so that with a confirmation copy selected files as needed and the auxiliary program with WWW browser (GetRight or similar) which will take over the task of FTP transmission and after stop using the browser.