ISP Domain means the network, systems and applications infrastructures under the control of ISP.
ISP deploys and manages all resources within the ISP Domain.
In a networking scenario with multiple ISPs, the device can connect to users of different ISPs. These users can have different user attributes, such as different username and password structures, different service types, and different rights. To manage users of different ISPs, configure authentication, authorization, and accounting methods and domain attributes for each ISP domain as needed.