高职 电子商务专业《电子商务英语》课件-Unit 3 Internet and World Wide Web.pptVIP

. HTTP is the first set of letters at the start of every web address， followed by the domain name. The domain name specifies the organization’s server computer that is housing the document. Most companies have a domain name that is the same as or closely related to their official corporate name. The directory path and document name are two Text B World Wide Web more pieces of information within the web address that help the browser track down the requested page. Together， the address is called a Uniform Resource Locator， or URL. The URL specifies the Internet address of a file stored on a host computer connected to the Internet. Every file on the Internet， no matter what its access protocol， has a unique URL. Text B World Wide Web When typed into a browser， a URL tells it exactly where to look for the information. For example， in the following URL： http///content/ features /082602.html http=the protocol used to display web pages; =domain name Text B World Wide Web Content/features=the directory path that identifies where on the domain web server the page is stored 082602. html=document name and its format （an html page）. The most common domain extensions currently available and officially sanctioned by ICANN are shown in the list below. Countries also have domain names Text B World Wide Web such as. uk.au， and. fr （United Kingdom， Australia， and France）. Also shown in the list below are recently approved toplevel domains. biz and info， as well as new domains under consideration. In the near future， this list will expand to include many more types of organizations and industries. Text B World Wide Web To access the World Wide Web， you must use a web browser. A browser is a software program that allows users to access and navigate the World Wide Web. There are two types of browsers： graphical and text browsers. Text， images， audio， and v