Discovery Services can be provided by a Local Discovery Server or by the Server. A Local Discovery Server is used when more than one OPC UA Application could be available on a single platform. If only one dedicated Server is available on a platform, usually that Server also functions as a Discovery Server. The Local Discovery Server exposes the following services that do not require OPC UA security: FindServers, and GetEndpoints. See the recommendations described in OPC 10000-4 related to these unsecured services.