Which three authentication services are supported by Cisco NAC Appliance? (Choose three.)
A. RADIUS
B. LDAP
C. Kerberos
D. TACACS+
E. local
F. SNMP
Which three authentication services are supported by Cisco NAC Appliance? (Choose three.)
A. RADIUS
B. LDAP
C. Kerberos
D. TACACS+
E. local
F. SNMP
Cisco NAC works with existing authentication sources, natively integrating with Active Directory, Lightweight Directory Access Protocol (LDAP), RADIUS, Kerberos, S/Ident, and others.
https://www.cisco.com/c/en/us/products/collateral/security/nac-appliance-clean-access/product_data_sheet0900aecd802da1b5.html
So ABC is correct
A. RADIUS
B. LDAP
D. TACACS+
Kerberos is part of LDAP method