Firewall

A network security device that monitors and controls incoming and outgoing traffic based on predefined rules. Firewalls enforce boundaries between trusted and untrusted networks by filtering traffic based on IP address, port, and protocol. They remain the first line of defense in every network security architecture.

Definición editorial de DecipherU. Para definiciones técnicas autorizadas, consulta NIST, ISO, o el organismo de normalización correspondiente.