---
title: Related information
description: Find more information about the Network Intrusion Detection System \(NIDS\) extension class, OT extension classes, and related applications.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/operational-technology/operational-technology-manager/otm-related-information.html
release: australia
product: Operational Technology Manager
classification: operational-technology-manager
topic_type: reference
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Reference, Operational Technology Manager, Operational Technology]
---

# Related information

Find more information about the Network Intrusion Detection System \(NIDS\) extension class, OT extension classes, and related applications.

## Extension classes overview

The extension classes help you understand how Operational Technology Management works with the Configuration Management Database \(CMDB\).

-   **[Network Intrusion Detection System \(NIDS\) CI extension class](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/servicenow-platform/cmdb-network-ids-nids-ci-extension-class.md)**

    The Network Intrusion Detection System \(NIDS\) \[cmdb\_ci\_nids\] class builds the relationships between passive network monitoring appliances, and the devices on the network that it discovers.

-   **[Operational Technology \(OT\) extension classes](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/servicenow-platform/cmdb-ci-class-models-operation-technology.md)**

    The Configuration Management Database \(CMDB\) updates classes for OT.


## Related applications

-   **[CMDB CI Class Models app](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/servicenow-platform/cmdb-ci-class-models.md)**

    The CMDB CI Class Models store app adds class models that extend the CMDB class hierarchy, including class descriptions, identification rules, identifier entries, and dependent relationships.


**Parent Topic:**[Operational Technology Manager reference](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/operational-technology/operational-technology-manager/operational-technology-manager-reference.md)