Correct Answer: A,B,C
Explanation/Reference:
Explanation:
TACACS+ uses Transmission Control Protocol (TCP) port 49 to communicate between the TACACS+ client and the TACACS+ server. An example is a Cisco switch authenticating and authorizing administrative access to the switch's IOS CLI. The switch is the TACACS+ client, and Cisco Secure ACS is the server.
TACACS+ communication between the client and server uses different message types depending on the function. In other words, different messages may be used for authentication than are used for authorization and accounting. Another very interesting point to know is that TACACS+ communication will encrypt the entire packet.
Reference: http://www.networkworld.com/article/2838882/radius-versus-tacacs.html