What is firewall technology?

Firewall technology 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 prevent unauthorized access to or from private networks, protecting against cyber threats like malware, viruses, and hackers. They can be implemented in hardware or software, and are essential for securing computer systems and networks.