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What is a firewall?Traditionally a firewall has been seen as a dedicated device, or a system of dedicated devices, intended to control the data going in to and out of a computer network. The point of this control is to make sure that only the data that the network's owners want, is allowed to go in or out.
How Firewalls WorkBasically, a firewall is a barrier to keep destructive forces away from your property. In fact, that's why its called a firewall. Its job is similar to a physical firewall that keeps a fire from spreading from one area to the next. As you read through this article, you will learn more about firewalls, how they work and what kinds of threats they can protect you from.
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