Demilitarised Zone. A term borrowed from the army, the demilitarised zone in technology is a computer or a small network inserted between the company’s private LAN and the public Internet. This is used to prevent and trap hackers from getting at company information that resides securely in the private LAN. When hackers manage to break through the first layer of security, they would in all likelihood be trapped inside the DMZ under the false impression that they are within the actual private network. This sense of false security will give network security professionals sufficient time to track and trace the intrusion attack.