Which of the following provides accounting, authorization, and authentication via a centralized privileged
database, as well as, challenge/response and password encryption?

A.
Multifactor authentication

B.
ISAKMP

C.
TACACS+

D.
Network access control

Explanation:
TACACS+ (Terminal Access Controller Access-Control System Plus) is a protocol that handles authentication,
authorization, and accounting (AAA) services. Similar to RADIUS, TACACS+ is a centralized authentication
solution used to provide access to network resources. TACACS+ separates the authentication, authorization,
and accounting services enabling you to host each service on a separate server if required.