Which TACACS+ server-authentication protocols are supported on Cisco ASA firewalls? (Choose three.)

A.
EAP

B.
ASCII

C.
PAP

D.
PEAP

E.
MS-CHAPv1

F.
MS-CHAPv2

Explanation:
BD
The ASA supports TACACS+ server authentication with the following protocols: ASCII, PAP, CHAP, and MSCHAPv1.
Source: http://www.cisco.com/c/en/us/td/docs/security/asa/asa91/configuration/general/asa_91_general_config/
aaa_tacacs.pdf