Editing Technical Test (section)

====network====
short poll / long poll / web sockets
* Short polling (a.k.a. AJAX based timer):
** Pros: simpler, not server consuming (if the time between requests is long).
** Cons: bad if you need to be notified WHEN the server event happens with no delay.
* Long polling (a.k.a. Comet based on XHR)
** is Half-Duplex meaning that a new request-response cycle is required each time the client wants to communicate something to the server.
** Pros: you are notified WHEN the server event happens with no delay. 
** Cons: more complex and more server resources used. 
* Web Socket
** Full-Duplex meaning both the client and the server can send and receive messages across the channel.