When NSO connects to a device it discovers the device version and the appropriate data model version. The NSO Web interface, CLI, database and APIs are version-aware, so the correct model will be used. When committing changes to the network, a user can choose different strategies (require all devices to support all changes, or skip changes to devices not supporting them). The network engineer using NSO does not have to keep device versions in mind, NSO resolves all of this.
