The term “fire wall” originally meant, fireproof wall which prevents the fire from entering one place to another. The Internet is a very unsafe environment when viewed from a computer-security perspective. Firewall provides you Network security.
A firewall is a software program or piece of hardware that helps screen out hackers, virus, and worms that try to reach your computer over the Internet and steal your important data. Firewall checks every data packet and if it is harmful for the PC, it blocks that particular data packet. Now a days Firewall is necessary for every PC. It helps us in various ways -
- If you use a computer at home, the most effective and important first step you can take to help protect your computer is to turn on a firewall.
- Windows 7, Windows Vista, and Windows XP SP2 or higher have a firewall built-in and turned on by default.
- If you have more than one computer connected in the home, or if you have a small-office network, it is important to protect every computer. You should have a hardware firewall (such as a router) to protect your network. You should also use a software firewall on each computer to help prevent the spread of a virus in your network if one of the computers becomes infected.
- If your computer is a part of a business, school, or other organizational network, you should follow the policies established by the network administrator.