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A proxy server is a "midway point" (usually a computer system or application) between a client and a server. Proxy servers are used to transmit information between the two.
Usage
Proxy servers can be used to keep increase the speed of network traffic and file transfers.
Filtering
Filtering allows a proxy server to block requests from unwanted machines.
Anonymous Browsing
A common use of a proxy server is its ability to browse the Internet anonymously. This is valuable if a user wants to hide his IP (Internet protocol) address.
Security
Proxy servers can also be used to scan for malicious software before it reaches the user's machine.
Proxy Types
More specific forms of proxy include "caching proxy," "Web proxy" and "Content-filtering web proxy."
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