What is a firewall?

Posted by bob on Oct 14, 2017 8:07 AM EDT
Networkworld; By Brandon Butler
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Network-based firewalls have become almost ubiquitous across US enterprises for their proven defense against an ever-increasing array of threats. A recent study by network testing firm NSS Labs found that up to 80% of US large businesses run a next-generation firewall. Firewalls act as a perimeter defense tool that monitor traffic and either allow it or block it.

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