*4.1.1 NIDs (network intrusion detection system)*

NIDs are implemented at a prearranged point in the organization to examine traffic from all associated devices. It inspects completely subnetwork correspondence and looks at it as an information base of perceived dangers. An alert can be given to the chairman at whatever point an attack has been identified or bizarre conduct has been found. To determine whether someone is attempting to breach the firewall, NIDs are introduced on the subnet where firewalls are installed.
