Firewalls – Why You Need One On Your Computer

Education and Certifications

The original use of the term “firewall” was the description of the brick and mortar wall built in between houses to prevent a fire from spreading from one house to the next.

A computer firewall does basically the same thing, it prevents bad things from entering your computer. A properly installed firewall protects you from many online threats, all dangerous to your data. A firewall protects you from hackers attempting to break in, some viruses called worms that spread from computer to computer over the Internet. Some firewalls block outgoing traffic that might originate from a virus infection from your computer.

> Read entire article (log in required - registration is free)