Microsoft ships its OS with Netstat program, which displays in a text line interface all the opened connections at a certain time. In other words, the fewer nodes the signal travels, the shorter your waiting time will be. This circle is complete in about a few seconds, depending on your bandwidth (the larger the better) or how far you are from the computer where the data you asked for is stored.
That signal circulates through a number of internet points (DNS and web servers, gateways, routers, switches) to accomplish what you have asked for, then returns to your application releasing the results for your view (a web page, file download, a loading list, etc.). Have you ever asked yourself what is happening when you open your web browser, type in an address and press enter? Or when you go online through your usual applications, like IM software, online games, antivirus and so on? At that moment you make a request.
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