In the unfortunate case of a fire, the firewall can contain the fire to prevent the fire from spreading and enables people to escape quickly.Ī network firewall works similarly in that it stops harmful activities before they can spread to the other side of the firewall and cause harm to private networks. In a building structure, the firewall provides a barrier. How does a firewall work?Ī firewall in a computer works the same way as a firewall works in a building structure. You don’t want all your computers and servers to be vulnerable to hackers and accessible to everyone on the internet. A firewall’s main job is to prevent hackers and malicious traffic from entering your private network, protecting your private network from viruses and malware.Ī firewall is especially important in a large organisation with many computers. A firewall is needed because the internet is full of hackers and malicious traffic that wants access to your private network to cause harm.
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