How Does a Network Firewall Work?
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A network firewall works by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between the trusted internal network and the untrusted external network (e.g. the internet) to protect from malicious activities such as hacking and malware. The firewall typically examines packets of data flowing through the network for malicious content, and makes sure that only authorized data can enter and exit the network. It also blocks certain types of traffic and provides encryption for secure communications.