Question

what does a firewall do
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Answer 1

Explanation:

A fire wall just put a restriction on your devices from showing sites like Facebook,Instagram,etc. It is usually used by schools,colleges or pvt. acad..

Answer 2

Answer:Firewalls sit between a network (such as the Internet) and the computer (or local network) the firewall is protecting. A firewall's main security purpose for home users is blocking unsolicited incoming network traffic, but firewalls can do much more than that.

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