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Firewall definition

A firewall prevents computers on a network from communicating directly with external computer systems. A firewall typically consists of a computer that acts as a barrier through which all information passing between the networks and the external systems must travel. The firewall software analyzes information passing between the two and rejects it if it does not conform to pre-configured rules. A firewall is a program that can be downloaded from the Internet and which monitors connections to the internet. It looks at every piece of data zipping across Internet connection. The firewall protects computers from malicious attacks and from hackers.


 
 

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