Protecting the corporate network using firewalls

Thursday, 14 April 2005, 11:22 AM EST

To protect the internal network from external networks like the Internet, most companies employ some sort of firewall. The term came originally from building construction, where a firewall is a wall designed to segment the building and prevent, or at least hinder, the fire from spreading. Firewalls in the network security sense play a similar role in that they segment the network and prevent or hinder the spread of malicious attacks or unauthorised access.

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