Question

what is firewalls in networking.briefly explain

Answer 1

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A 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. Firewallsprevent unauthorized internet users from accessing privatenetworks connected to the internet, especially intranets.

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Answer 2

Outside of computer security, a firewall is simply a wall built to stop (or slow down) the spread of a fire. In terms of computer security, a firewall is a piece of software. This software monitors the network traffic. A firewall has a set of rules which are applied to each packet. The rules decide if a packet can pass, or whether it is discarded. Usually a firewall is placed between a network that is trusted, and one that is less trusted. When a large network needs to be protected, the firewall software often runs on a computer that does nothing else.

A firewall protects one part of the network against unauthorized access.


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