What does E-Sight single-server mode restrict regarding user login?

In E-Sight single-server mode, the system is designed to ensure that only one user can log in at a time. This restriction is important for maintaining session integrity and security. By allowing only one user to access the server at any given moment, it minimizes the risks associated with concurrent access, such as data corruption or conflicts that might arise from multiple users making changes or accessing information simultaneously.

This mode is particularly useful in environments where sensitive data is processed or where specific configurations need to be managed without interference from other users. Such a design choice is not only about security but also about performance, ensuring that the user experience remains seamless and unaffected by other simultaneous logins.

Other options do not align with the functionality of the E-Sight single-server mode; they imply either uncontested access or multiple simultaneous logins, both of which would contradict the fundamental purpose of this operational mode.