Which two statements about authentication settings for DCNM-LAN are true？ （）

• A、 If none of the authentication servers that are configured for the current authentication mode responds to an authentication request， the DCNM-LAN server falls back to localauthentication.
• B、 DCNM-LAN only supports TACACS+.
• C、 Each DCNM-LAN server will have the same device credentials.
• D、 Administering DCNM-LAN authentication settings requires an authentication license.
• E、 DCNM-LAN server users are local to the DCNM-LAN server.