How are 'Custom Attributes' created in Cisco ISE?

Custom Attributes in Cisco Identity Services Engine (ISE) are created through the ISE Graphical User Interface (GUI) or by using the Application Programming Interface (API). The GUI provides a user-friendly way to define new attributes that can be associated with endpoints or user identities, making it accessible for administrators to manage these settings without needing deep programming knowledge or command-line familiarity. Additionally, using APIs allows for automated and programmatic creation of custom attributes, enabling integration with other applications or systems that utilize ISE data.

Options suggesting the use of CLR-based devices, CLI commands only, or manual configuration of network settings do not directly apply to the process of creating custom attributes within the ISE context, as the focus is specifically on attribute management and user-defined configuration, which is best facilitated through the GUI or API.