What is a firewall - how do firewalls work? | Explained in brief. #firewalls #securitySystem #privacy #NetworkTraffic #networkAnimal #Networking A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predefined rules. It acts as a barrier between a trusted internal network and untrusted external networks, such as the Internet. Firewalls prevent unauthorized access, block malicious traffic, and ensure data privacy by filtering harmful content whi