How Web Pages Work
The World Wide Web is the fastest growing and, in many ways, the most exciting and interesting part of the Internet.
As its name implies, the World Wide Web is a globally connected network. The Web contains many things, but what makes it so attractive to so many are the web "pages" that incorporate text, graphics, sound, animation, and other multimedia elements. In essence, each page is an interactive multimedia publication that can include videos and music as well as graphics and text.
Pages are connected to one another using hypertext that allows you to move from any page to any other page, and to graphics, binary files, multimedia files, as well as any Internet resource. To jump from one page to another, you click a hypertext link, a link that connects web pages and resources.
The Web operates on a client/server model. You run web client browser software, such as Netscape Navigator or Microsoft s Internet Explorer, on your computer. That client contacts a web server and requests information or resources. The web server locates and then sends the information to the web browser, which displays the results.
Pages on the Web are built using a markup language called Hypertext Markup Language (HTML). The language contains commands that tell your browser how to display text, graphics, and multimedia files. It also contains commands for linking the page to other pages and to other Internet resources.
The term home page often is used to refer to the first, or top, page in a collection of pages that make up a website.
How Web Browsers Work
Like much of the Internet, the World Wide Web operates on a client/server model. You run a web client on your computer called a web browser such as Microsoft s Internet Explorer or Firefox. That client contacts a web server and requests information or resources. The web server locates and then sends the information to the web browser, which displays the results.
When web browsers contact servers, they re asking to be sent pages built with Hypertext Markup Language (HTML). Browsers interpret those pages and display them on your computer. They also can display applications, programs, animations, and similar material created with programming languages such as Java and ActiveX, scripting languages such as JavaScript, and techniques such as AJAX.
Sometimes, home pages contain links to files the web browser can t play or display, such as sound or animation files. In that case, you need a plug-in or a helper application. You configure your web browser or operating system to use the helper application or plug-in whenever it encounters a sound, animation, or other type of file the browser can t run or play.
Over the years, web browsers have become increasingly sophisticated. Browsers are now complete software suites that can do everything from videoconferencing to letting you create and publish HTML pages.
Increasingly, a browser is not just a single piece of software, but an entire suite. The newest version of Internet Explorer, for example, includes security features such as an anti-phishing filter. The Firefox browser has a companion piece of email software called Thunderbird that can be downloaded as well.
When browsing the Internet, one of the most frustrating experiences is the error messages browsers display when they re having trouble contacting a website. Depending on which browser you use, and which version of the browser you re using, those messages might differ. Sometimes browsers display error messages.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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