Firewall
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5 Types of Firewalls
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Firewall Trailer HD
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What is a Firewall?
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How firewalls work | Network firewall security | firewall security | TechTerms
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What is a Firewall and How Does it Work?
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.
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