After you connected unmanaged switch to the port dot1x failed. What is the problem?
A. missing command "MAB"
B. there is no BPDU in the port
C. eapol packet not received in the port
D. missing command "authentication host-mode multi-host"
E. missing command "authentication host-mode multi-auth
Multi-authentication host mode: you can authenticate multiple source MAC addresses. You can use this when your switchport is connected to another switch. Each source MAC address is separately authenticated.
Answer E
By default, MAB only supports a single endpoint (device) per switchport. When it sees more than one source MAC address, it causes a security violation.
https://networklessons.com/cisco/ccie-routing-switching-written/mac-authentication-bypass-mab‘