Proxy is something that acts as a server, but when given requests from clients, acts as a client for real server. Analogy: Consider talking to someone who spoke a foreign language through a translator. Talk to the translator, who receives their statements, then regenerates another thing entirely to the other end.
The proxy server acts as a translator. Key point: the communication ends in the proxy. In other words, the proxy does not transmit data as much as tears apart completely. For example, an HTTP proxy not to submit all requests sent through it. Instead, it first looks if you have already requested the website in its cache. If so, it returns a page without submitting another request to the destination server. Because the powers completely finished the communication channel is considered a more secure server technology security packet filters, which drastically increase the isolation between networks. Key point: You sometimes analyzed for power. Internet service providers for their users to scan proxies. Hackers scan the Internet looking for the powers that can be anonymous connections. Some servers (like IRC servers) for the exploration of clients who are authorized to prevent anonymous connections.
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