[計(jì)算機(jī)軟件及應(yīng)用]計(jì)算機(jī)與網(wǎng)絡(luò)-展示頁(yè)
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【正文】 World Wide Web and its workings. ?Using the Web ?What39。s in the Web? ?Introduction to HTML Forms and Servlets 3 Using the Web Surfing the Web Your Web Pages Clients, Servers, and URLs Searching the Web Commerce on the Web Some Ethical Considerations 4 Surfing the Web Inter World Wide Web Surfing Inter Service Provider ( ISP ) 5 Inter Inter is a puter work that connects millions of puters across a number of countries. There is no central authority that controls the Inter。s puter to the mail server. ?Email system uses the POP3 protocol to transfers the message from the mail server to the user. ?Email messages can send nontext files, such as graphic images and sound files, as attachments sent in binary streams 12 The main Inter service Email 13 The main Inter service FTP (File Transfer Protocol) ?FTP is the primary means of getting files from the remote host on the Inter ?When the file is sent from client to a remote host, known as the “ file upload” (Upload)。 Chrome (Google)。 21 Your Web Pages “Reasonable” Person Principle When hosting a website, pages should be maintained for others to view Information on the pages should be correct and uptodate. Presenting information on web page implies being responsive to s by surfers. Displaying personal information on web pages not a good idea. 22 Clients, Servers, and URLs ClientsAn application that requests information from a server application or asks the server to perform some task. Eg, Web Browser. ServersApplications that run on relatively more powerful puters, to service concurrent requests from a number of clients. 23 Clients, Servers, and URLs Client asks for the resource and deals with it. Server provide the resource. Ask for the resource Provide the resource The browser is considered a client. The site that supplies the information is considered a server.
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