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What does a firewall do?
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It is a device that allows network traffic based on rules.
It is a wall that stops a fire from spreading.
It is a very strong password.
It is anti-virus software made by Microsoft Windows.

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strawberrypie454

Answer:

Explanation:

As far as I know, the first option is correct;

It help protect your network by filtering traffic and blocking outsiders from gaining unauthorized access to the private data on your computer. Not only does a firewall block unwanted traffic, it can also help block malicious software from infecting your computer.

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