What is a common use for TACACS+ in identity management?

TACACS+ (Terminal Access Controller Access-Control System Plus) is primarily utilized in network device management due to its design and functionality specifically for authenticating, authorizing, and accounting access to network devices. It is particularly effective in environments where centralized control of network device access is paramount, such as routers, switches, and firewalls.

The protocol operates as a client-server model, allowing devices to communicate securely and manage access permissions effectively. Its capability to separate the authentication, authorization, and accounting processes enhances security by providing granular control over user access and activities on network devices.

In contrast, other choices such as web application authentication and single sign-on facilitation typically involve protocols and systems designed explicitly for user access management in web environments. User identity creation is often handled by identity management systems that focus on user profiles and metadata rather than the direct interaction with network hardware that TACACS+ specializes in. Thus, TACACS+ is most aligned with the management and secure access of network devices.