A web proxy acts as a middle man between you and the web site you are intend to reach. Instead of calling on the FaceBook/Myspace page, your computer would call on the proxy page which eventually calls on FaceBook/Myspace page fetching the information back to your computer. Your computer only accesses the proxy site, and Myspace only sees the proxy site, not your computer. People use proxies for different reasons. Some people wish to have increased security when browsing the web.
Many web proxies also blocks malicious scripts, which prevents the spread of harmful and illusive viruses. It is also very common for employees at a company to use proxies to browse blocked content Myspace, Facebook, and other sites that the company would usually block. Besides that, anonymous proxy servers helps cases when, the owners of the Internet resource adheres some limitation on users from certain countries, cities, geographic areas or regions or even restrictions on some IP address in ranges.
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