Push and Pull Technology:
In pull technology, browsers on the user's computers pulls information from servers. The browser must make a request before any information is delivered. Push technology is the opposite. Push technology automatically delivers information to the computer. You subscribe to a service and specify the information you want to recieve. The server then delivers this information periodically. This can be used for news headlines, or getting the latest software upgrades.
RSS:
RSS stands for Really Simple Syndication. It is an XML-based format for sharing data. RSS check the websites or feeds that people subscribe to and send the subscriber all the new content, as opposed to the subscriber having to check several different websites to see if they have been updated.
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