Firewall is being used for network security. It can be either hardware or software based. It controls the incoming and the outgoing network traffic. Firewall stands in between the internal and external network. Firewall acts as a wall of protection for the computer. It provides security from the threats and the malwares. This technology had been developed in the late 1980s. Without the permission of this firewall no program can enter the computer. Even if you have an anti-virus installed on your system, it is good to enable the firewall.

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