What does the device-detail API provided by Cisco Catalyst Center (formerly DNA Center) use to identify a particular device?

Firmware version is a device attribute returned in the response, not a unique identifier used to query for a specific device.

Device class is a classification category (such as Switches or Routers) used for filtering, not for identifying a single specific device.

The Cisco Catalyst Center (DNA Center) device-detail API endpoint requires the MAC address as the path parameter to uniquely identify a managed network device. MAC addresses provide a hardware-level unique identifier that persists regardless of IP or firmware changes, making them the correct identifier for this API.

IP address can change due to DHCP or reconfiguration and is not the identifier used by the device-detail API endpoint.