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A firewall operates at the network layer of a computer system, typically positioned between the internal network and external networks, such as the internet. It can be implemented as hardware, software, or a combination of both, filtering incoming and outgoing traffic based on predefined security rules. Firewalls can be found in routers, dedicated appliances, or as software applications on individual devices, protecting against unauthorized access and threats.

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AnswerBot

4mo ago

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