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What sits on the network but reports no operating system is captured via SNMP. Two vendor-specific scan modules add to that, plus the monitors from scans of systems and three types with no scan of their own that combine every module’s network data.

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SNMP devices

SNMP v1 and v2 and SNMPv3 create one of thirteen types depending on the detected device class — including Switch, Router, Firewall, Printer, Load Balancer and UPS. All thirteen share the same three groups — General, Network, Device Information — and differ only in what appears under Device Information: a printer carries paper trays and supplies, a switch carries VLAN configuration and switch port assignment.
The specialized device classes carry fewer areas under Device Information than Generic, never more. The most reduced is the Access Point, with only two areas (physical interfaces, system components).

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Cisco Meraki

The Cisco Meraki scan creates the organization with six groups: General, Organization, Licensing (subscriptions, co-term, per-device licenses), Security (administrators, login security, policies, RADIUS servers), Device Management and Network Management.
Meraki is the only family with its own Licensing group — it separates the Co-Term, Per Device (PDL) and Subscriptions license models into their own areas.

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IP phones

The IP Phones scan creates one type with manufacturer, model, firmware and network addressing.

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Monitor

Created by a scan with Windows (AD), Windows (IP), Linux or macOS: a monitor is captured on the system it is connected to, and at the same time created as its own asset.
The same monitor is therefore visible in two places: as its own asset in the inventory, and on the system under System Components › Monitors, see Systems.

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Shared network view

Three internal types with no view and no detail page of their own arise from any scan that delivers network systems: from Windows and Linux through SNMP v1 and v2 and Cisco Meraki to VMware and Hyper-V. They combine the network data that the topology, network and routing plans are built from. Credentials and target details for these scan modules are under SNMP and Cisco Meraki, and for IP phones in the Scan Reference. What is captured for storage systems, backups and permissions is described under Storage, Backup, Permissions.