In which scenario can Netinstall NOT be used to install a RouterBOARD?

Netinstall is a powerful tool used to install or reinstall the RouterOS on MikroTik RouterBOARD devices, primarily by sending the operating system image over the network. To effectively use Netinstall, the router must be in a certain state and connected in a specific manner.

When a router is connected only to a wireless network, there are several barriers that prevent successful Netinstall operations. Netinstall relies on a direct Ethernet connection to function correctly since it uses a specific method for discovering devices on the local network and transferring the operating system. If the router is only connected via a wireless network, it will not be able to communicate properly with the Netinstall server over Ethernet, as this process usually occurs directly over the wired interface.

In comparison, if the router does not have an operating system, the Netinstall tool can still be utilized to install the software. Additionally, not knowing the password does not affect the ability to use Netinstall, as the tool operates independently of the device's previous configurations or user access. Finally, if the router is connected only to a secondary Ethernet port, as long as there is a proper connection established, Netinstall can still function.

Thus, the correct scenario where Netinstall cannot be used is when the router is solely connected to a