What is a Firewall?
FAQ - What is?

A firewall is a piece of software that limits the information going into and out of your PC to the internet.  Windows XP and Vista both have a firewall built in which works in the background and is considered sufficient in most circumstances.  It is possible however to buy and install additional software as required.

In simple terms think of your PC as a walled city and the firewall as a guard on the gate monitoring access.


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