210-260有道题求助

dbz0451

According to Cisco best practices, which three protocols should the default ACL allow an access port to enable wired BYOD devices to supply valid credentials
and connect to the network?
A. BOOTP
B. TFTP
C. DNS
D. MAB
E. HTTP
F. 802.1X

答案是ABC，然而我觉得是DEF……