networking revision
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Networking revision for AQA computing By W Hamilton
Hardware and software Client Server IIS Protocols HTTP TCP/IP Web browser Web server Routers, Cables, modems
Networking hardware
The protocol stack Data link layer Network layer Transport layer Application layer http, telnet, email, ftp TCP, UDP IP Cables, routers, drivers
IP - routing
Domain name system Converts user friendly domain names into IP addresses All domains must be registered www.google.com <-> 67.4.5.9 www.cs. colorado. edu. 86.45.6.7.
HTML – hypertext mark up language <html> <head> <title> a description</title> </head> <body> <h3> some text </h3> <p> text in a paragraph <body> </html>
CSS - Cascading style sheets
CSS - Cascading style sheets
Static web pages http://abc.com/index.html
Dynamic web pages
Dynamic web pages (server side) A search term
CGI Dynamic web pages (server side)
Dynamic web pages (client side) Javascript, Flash, Java, Media – requires a software plugin or interpreter Improves interactivity – processing without the latency Reduces processing on server Reduces network traffic
Dynamic web pages (client side) <html> <body> <h3> some text </h3> <p> text in a paragraph <body> </html> <script type="text/javascript"> function validate(field,alerttxt) {alert} </script> <object> <param name="movie" value="somefilename.swf"> <embed src="somefilename.swf"> </object>
Summary: Revision for AQA GCE computing
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