What is F/W?

F/W is commonly an abbreviation for Firewall. 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 often implemented in hardware or software, or a combination of both. They are essential for protecting networks from unauthorized access, malware, and other security threats.