Firewall technologies are essential components of network security, designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. Firewalls act as barriers between trusted internal networks and untrusted external networks, such as the internet, preventing unauthorized access and potential cyber threats. They come in various forms, including packet-filtering firewalls, stateful inspection firewalls, proxy firewalls, and next-generation firewalls (NGFWs). https://www.infosectrain.com/courses/cissp-certification-training/