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6. The Internet > 6.3. Firewalls

Firewalls

No doubt you’ve heard about all the evils that lurk online: viruses that wipe out data on your computer, hackers that break into your system, or spyware that surreptitiously tracks what you type. It’s enough to make you consider unplugging from the global network and settling for Solitaire on your PC.

A better option is to employ a firewall—a valuable piece of software that guards your computer when you’re online. Essentially, firewalls erect a barrier around you while you surf the Internet, blocking malicious intruders from gaining access to your PC. Here are some hints on how to use firewalls—both the one built into Windows XP and a sophisticated version you can download.


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