Everyday millions of people around the world use the Internet for corporate use, research, and personal uses. If each person uses one computer to access the Net at any one time, that is trillions of bytes of data. People are in danger of being "infected or "hacked easily by brilliant hackers. What can a person do? The solution is to protect your computer using firewalls. Basically, a firewall is a barrier to keep destructive forces away from your computer.
A firewall is simply a program or hardware device that filters the information coming through the Internet connection. If incoming information is unusual by the filters, it is not allowed through.
Firewalls use one or more methods to control traffic flowing in and out of the network:
- Packet Filtering: Packets (small bits of data) are analyzed through a set of filters and then let through into the computer or to be discarded later