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What’s on the Internet?Here are some of the popular services on the Internet: FTP (File Transfer Protocol) FTP is an Internet service that transfers files from one computer to another. Some FTP servers require that you obtain an account before you have permission to copy files from the server. Other FTP servers have a special account, called “anonymous,” through which unregistered users can access files on the servers. electronic mail (e-mail) Electronic mail is the postal system of the Internet. It lets you send text messages to any recipient that has an e-mail address. Modern e-mail services allow the embedding of sound, video, and image files in e-mail messages. bulletin boards Bulletin boards, also called newsgroups or discussion groups, work similarly to electronic mail. However, instead of writing messages to individual users, participants in a bulletin board post their messages to a news server. On the news server, messages called articles are stored, often in hierarchical directories. Users participate in bulletin board services by reading messages and posting responses to them. Client software that can view a bulletin board service is called a newsreader. Gopher Gopher is an Internet browsing service organized as a series of menus. Gopher menu items can be files on the current server or they can point to menus on other Gopher servers. By navigating a series of Gopher menus, you travel around the Internet until you locate the information that you want. World Wide Web The World Wide Web is the most popular and fastest growing Internet service. It uses hypertext links called hyperlinks to locate and retrieve pages from World Wide Web servers. World Wide Web pages combine sound, graphics, animation, text, and software programs into dynamic documents. Users view the World Wide Web from Web browsers, client programs that can display the HTML (HyperText Markup Language) in which pages are written. IntranetsAn intranet is a network that exists exclusively within an organization and that is based on Internet technology. It delivers an organization’s informational resources to each member’s desktop quickly and inexpensively but protects the information from unauthorized access. Because an intranet is based on Internet technology, it can have thousands of users across many locations and still be private. An intranet can be set up inside a firewall, a software mechanism that blocks unwanted access to the intranet from outside while giving the users of the intranet access to the global Internet. Some of the ways organizations use intranets are:
Using World Wide Web technology, an organization can make its intranet easy to use. Microsoft FrontPage is an ideal tool for creating, maintaining, and administering intranets. |
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