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<!DOCTYPE html> <html lang="en"> <!-- But - - PowerPoint PPT Presentation
<!DOCTYPE html> <html lang="en"> <!-- But - - PowerPoint PPT Presentation
<!DOCTYPE html> <html lang="en"> <!-- But always use straight quotes --> <head> <meta charset="utf-8"> <title> </title> </head> <body> </body>
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<!DOCTYPE html> <html lang="en"> <!-- But always use straight quotes --> <head> <meta charset="utf-8"> <title> </title> </head> <body> … </body> </html>
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HTTP request HTTP response
Web Browser Web Server
HTML file
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GET / HTTP/1.1 Host: www.example.com HTTP/1.1 200 OK Content-Type: text/html Content-Length: 136 Server: Apache/2.2.3 <html> <head> <title>Example Web Page</title> </head> <body> <p>This is a sample web page</p> </body> </html>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"/> </head>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> </head>
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< attribute="value"
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