What is meant by the term 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 untrusted external networks, such as the internet, to prevent unauthorized access and protect against cyber threats. Firewalls can be implemented as hardware devices, software programs, or a combination of both.

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 trusted and untrusted networks, protecting computer systems and networks from unauthorized access, malicious software, and other threats. A firewall examines each network packet and allows or blocks its passage based on defined security criteria. Firewalls can be implemented in hardware, software, or a combination of both and are an essential component of network security.