Question

what is firewall and why its used??

Answer 1

firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized internet users from accessing private networks connected to the internet, especially intranets.

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Answer 2

Hey Buddy!!☺☺

A firewall is a network security system that monitors and controls the unauthorized access to a private network.