What is firewall? Firewalls are devices or programs that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules. Types of firewalls Hardware Firewalls: Dedicated devices like Cisco ASA, Fortinet. Software Firewalls: Runs on servers, e.g., Windows Defender Firewall, iptables. Next-Generation Firewall (NGFW): Integrates deep packet…