What is firewall: Firewallsprotect networks by monitoring and

Firewallsprotect networks by monitoring and controlling traffic based on defined rules. Learn what afirewallis, how it works, and explore key types. Firewallsprotect against cyber attacks by blocking malicious traffic. Learn more about howfirewallswork, different types offirewalls&firewallexamples. May 19, 2025 ·Afirewallis a network security device that prevents unauthorized access to a network by inspecting incoming and outgoing traffic using a set of predetermined security rules. The main purpose of afirewallis to act as a barrier between a trusted internal network, such as a home or business network and untrusted external networks, such as the internet, to help prevent unauthorized access ... A firewall isa network security system that monitors and controls network traffic based on configurable rules.Learn about the history, types, and functions of firewalls in computing.