Because firewall protect your computer from different types of hacking attack. Simply a firewall can be viewed as a traffic cop controlling the flow of cars at a highway intersection, ensuring that they obey the rules of the road. That is to say a firewall filters the information coming from the Internet connection into your network or computer system and filters information outgoing to the Internet.
As you read through this inforgraphic, you will learn more about firewalls, firewall configuration and tips for online security.
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