How many DHCP servers can be configured per interface on RouterOS?

In RouterOS, a single interface can be configured to support only one DHCP server at a time. This limitation ensures that there is no conflict when multiple DHCP servers attempt to assign IP addresses within the same network segment. When a DHCP server is operated on an interface, it maintains control over the IP address allocation process, and having multiple DHCP servers could lead to IP address conflicts or result in clients receiving conflicting configurations.

This design choice is aligned with standard networking practices, where a clear and singular authority for IP address assignment is crucial in maintaining network stability and functionality. Therefore, the correct answer confirms that only one DHCP server can be configured per interface in RouterOS.