A firewall is a security system that prevents harmful data exchange between computers, networks, and the Internet according to pre-determined security rules. All data between the computer and the network and the Internet has to be transmitted through the firewall for filtration. Sometimes hackers, viruses, or worms try to access your computer via the network, the internet, or other sources, at which time it prevents them from entering your computer.
In short, the firewall is a check post that monitors and controls incoming and outgoing network traffic and prevents unauthorized access.
In almost all Windows operating systems, it already exists and by default, it is turned on.
Is Firewall Software or Hardware?
A firewall can be a software program or piece of hardware. Generally, a hardware firewall sits between the network, and the software firewall is installed on your computer.
Software Firewall is a program installed on your computer and sits between your computer and the Network to inspect all types of data incoming or going from networks. The Software acts as a gatekeeper and stops unauthorized traffics to enter your computer directly. It is very important to have a software firewall installed on your home computer which is directly connected to the internet via Wi-Fi. It also protects your computer from infected computers of networks. An example is Windows software Firewall.
In almost all Windows operating systems, the firewall already exists and by default, it is turned on. If you are using Windows 7 or earlier version of the Windows operating system, Press Windows button of the keyboard and search “firewall” to find it.
Mac’s firewall is off by default which you can enable from Security & Privacy in System Settings.
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A hardware firewall is a tool that sits between your computer and the Internet to prevents harmful data being communicated between the Internet and the computer.
It sits away from the computer due to being a hardware. If your computer has been infected by a virus or worms, then viruses and worms can disable the software computer but it is difficult to disable hardware being an external device.
Software for home computers is adequate but large companies, networks, and large corporations should use strong hardware firewalls.
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