Product
The inventory reads itself off the devices
NacTrack reads models, software versions, serial numbers and free ports off every device, and refreshes them on every collection. Nothing is typed in by hand.

What is captured on each device
Identity
Name, vendor, model, serial number, site, role in the network.
Software
Exact version, which drives both vulnerability exposure and support status.
Ports
Used, free, in error, with negotiated speed and configured VLAN.
Addressing
Addresses carried by interfaces, VRF, and the subnets that follow from them.
Endpoints seen
MAC and ARP addresses learned, which is how a machine is found from a single clue.
Configuration
The full text, kept and dated, which makes comparing two dates possible.

The questions
What an inventory settles
Three questions nobody settles from memory across two hundred devices.
- Which devices the vulnerability published this week reaches. That needs each one's exact model and version.
- Which devices are past vendor support. A chassis at end of support does not fail, it becomes unrepairable.
- How many ports are genuinely free at that site. A figure kept by hand drifts from the ports actually in use.
- Which device carries this serial number, and since when it has been in service.
- Which software versions coexist in production on one model. Rarely fewer than three.
