Must host names and visible names be unique and case sensitive in Zabbix?

In Zabbix, both host names and visible names must indeed be unique and case sensitive. The host name is primarily used for identification purposes, particularly in communication between the Zabbix server and the monitored host. It must be unique so that Zabbix can accurately associate data and events with the correct host.

The visible name is what users see in the Zabbix frontend, and it serves a similar purpose in providing clear identification among potentially many monitored entities. To avoid confusion and ensure that users can navigate the Zabbix interface effectively, each visible name must also be unique.

The case sensitivity aspect means that "Server1" and "server1" would be treated as different entities, further emphasizing the need for careful naming conventions to prevent potential conflicts. Thus, both the requirement for uniqueness and the aspect of case sensitivity apply to both host names and visible names in Zabbix, making the statement true.