In Hyper-V, which type of switch settings allows communication between virtual machines on the same host while not allowing communication with an external network?

The correct answer is C. Private.

In Hyper-V, a Private virtual switch allows communication only between virtual machines on the same host. It does not allow any communication with external networks or with the host itself. This is useful for scenarios where you want to isolate virtual machines from the outside world for testing or security purposes.

If you have any more questions or need further assistance, feel free to ask!