Normally when you go online, your request for any website travels from your computer more or less directly to the server that hosts your final destination—the website you’re trying to visit. At every stop along the way, however, your request cheerfully announces exactly where on the Internet it came from, and exactly where on the Internet it’s going, thanks to identifiers called source and destination headers, which you can think of as the address information on a postcard. Because of these headers, your Internet browsing can easily be identified as yours by, among others, webmasters, network
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