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High level view of all that happens behind the scenes when you access Facebook. Used in my Exploring Computer Science class (http://garfieldcs.com) to introduce the idea of computing systems and get students thinking about the problems CS addresses.
by Hélène Martin
on 9 September 2010
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What happens when you click 'login' on Facebook?
bieberluv95 » CF0BA53D1F03B4E4CE4D176B55E2A4B1 Your password is encrypted so hackers can't steal it Can we guarantee it can't be stolen? Can we know it's actually you? Who's responsible if your account is hacked? How can we help users choose good passwords? Your request is sent to Facebook servers What is the shortest path to Facebook? How can information be transmitted wirelessly? How much energy does Facebook use? Recent updates from your friends are found How much space does it take to store information on Facebook's 500 million users? How can Facebook find all your friends' status updates so fast? Facebook sends back a page What needs to change between mobile and desktop versions? How is the page content represented? How do applications access Facebook information? Is all of Facebook run on one computer? How is Facebook in China as fast as Facebook in the US? How does Facebook know when something is broken on their site? How does Facebook roll out updates? Your mouse sends a signal to the computer which sends a signal to the browser. How is that signal represented? How does the computer know where the mouse pointer is? How does the computer communicate with the web browser?
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