# OPC UA To interact with external systems (such as SCADA), the server implements the data access features via OPC UA. OPC UA – is a modern technology for communication in the fields of industrial automation, Internet of Things (IoT), etc. Technology provides opportunities for encryption of transmitted data and authentication/authorization of users. Available features and OPC UA settings are described below. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.monokot.io/basics/opc-ua.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.