What needs to take place for an environment using XTACACS to be compatible withan environment using TACACS+?

A.
The use of RADIUS will allow for this conversion to take place.

B.
The use of Diameter will allow for this conversion to take place.

C.
They are backwards compatible, so no conversion is necessary.

D.
There is no interoperability between them. They are two totally different protocols.

Explanation:
TACACS+ is really not a new generation of TACACS and XTACACS, it is a brand newprotocol that provides similar functionality and shares the same naming scheme.Because it is a totally different protocol it is not backwards compatible withTACACS or XTACACS.