ServiceNow IT Operations Management (ITOM) Discovery scans your IP ranges to identify hardware CIs, software instances, network interfaces, and cloud resources, automatically populating the Configuration Management Database (CMDB).
Discovery Architecture Overview
Discovery relies on MID Servers (Management, Instrumentation, and Discovery) running inside your internal enterprise network. The MID Server communicates securely with the ServiceNow cloud instance using HTTPS long polling on the ecc_queue table.