Why is TACACS+ the preferred AAA protocol to use with Cisco device authentication?
A.
TACACS+ encryption algorithm is more recent than other AAA protocols
B.
TACACS+ has a more robust programming interface than other AAA protocols
C.
TACACS+ was initially developed as open-source software
D.
TACACS+ provides true AAA functional separation and encrypts the entire body of the packet
E.
TACACS+ maintains authentication information in the local database of each Cisco IOS router
F.
TACACS+ combines authentication and authorization to provide more robust functionalities