firewall concepts

What is firewall concepts?

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and an untrusted external network, such as the Internet. Firewalls are commonly used to protect networks from unauthorized access, malicious attacks, and data breaches. They can be implemented in hardware, software, or a combination of both. Key functionalities include packet filtering, stateful inspection, proxy services, and intrusion prevention.