Regarding VSAs, which statement is true?
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A.
VSAs may be implemented on any RADIUS server.
B.
VSAs are proprietary, and therefore may only be used on the RADIUS server of that
vendor. For example, a Cisco VSA may only be used on a Cisco RADIUS server, such as
ACS or ISE.
C.
VSAs do not apply to RADIUS; they are a TACACS attribute.
D.
Each VSA is defined in an RFC and is considered to be a standard.