We all use firewalls to keep hackers and worms from accessing our computers. As the internet is a public network any computer connected to the internet can connect to another computer so we must have a firewall to stop people or viruses gaining unauthorised access to our computer.
Benefits of a firewall is it will shield your computer from unauthorised access from hackers which attempt to steal your personal information such as bank details, pin codes etc. Firewalls run in the background and have little to no effect on your computers performance which is also a great advantage.
Below is an example of a software firewall
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