Q: What is a firewall?
A: A firewall is software or hardware that protects other users or computers on
the Internet from taking over your computer. Microsoft
provides a good fire wall with Windows
XP Service Pack 2. Other companies
such as Symantec, Zonelabs, TrendMicro and McAffee offer
commercially available fire walls as apart of a security package
or individually for your computer which often includes virus scan. In addition many wireless routers include a firewall as do other home networking appliances.