What is a Firewall?
A firewall acts as a defensive border by helping to protect your computer from hackers, blocking malware from penetrating your system, and removing sensitive data from a compromised system. Firewalls scan each "packet" of data, small chunks of a larger whole, reduced in size for easy transmission, to make sure these packets don't contain anything malicious. Learn more here: https://goo.gl/QXLWKm
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