A Firewall is a security system that monitors and controls network traffic according to predefined rules. It can help block unauthorized connections while allowing legitimate communication between trusted devices, applications, and networks. Firewalls may be implemented as software, hardware, or cloud-based services and are commonly used in both home and enterprise environments. A properly configured firewall adds an important security layer against many network-based threats. Read the full article to learn how a Firewall works and why it matters for network security.