The UPAS NOC main module uses the patented ARP packet analysis technology, which can perform data collection, device identification and high-strength access control without installing Agent. The key functions are IP/MAC management, assets inventory, device access management (NAC, Network Access Control), and network blocking. Multiple bindings between IP / MAC / DHCP segment / computer name / hardware fingerprint (UUID) can be performed on all connected devices to achieve IP protection, IP reservation, IP invalidate, IP conflict prevention, and MAC impersonating. With the built-in reports, managers can manage intranet IP resources and devices in real-time.