What is a firewall in networking?

Firewall security

A firewall is a defensive system that lies between your computer network and the Internet. A firewall either be a hardware or software device. When we used appropriately, a firewall stops unauthorized use and access to your network & computer. The job of a firewall is to carefully examine incoming and outgoing data in the network-based configuration. It blocks the information that comes from an unsecured, unidentified or suspicious locations. A firewall plays a significant role on any network as it provides a defensive barrier against most forms of attack approaching from the outside world.

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