Explain firewalls?

Firewalls are software programs that are used to protect your computer from viruses and other malware. They are also used to protect your privacy and to keep unauthorized people from accessing your computer. Firewalls are often used in conjunction with antivirus software. They can help to block malicious programs from entering your computer, while also protecting you from unknown programs. In order to use a firewall, you will need to install it on your computer. It is important that you do this correctly since it can prevent your computer from being infected with malware. Firewalls can also be used in conjunction with antivirus software. They can help to block malicious programs from entering your computer, while also protecting you from unknown programs.