Which of the following is an authentication and accounting service that uses TCP for connecting to routers and switches?
A.
DIAMETER
B.
RADIUS
C.
TACACS+
D.
Kerberos
Explanation:
TACACS+ is an authentication, authorization, and accounting (AAA) service that makes us of TCP only.
Incorrect Answers:
A: DIAMETER makes use of TCP, as well as SCTP.
B: RADIUS makes use of UDP.
D: Kerberos is not an authentication and accounting service, but an authentication protocol.http://en.wikipedia.org/wiki/TACACS
http://en.wikipedia.org/wiki/Diameter_(protocol)
http://en.wikipedia.org/wiki/RADIUS
http://en.wikipedia.org/wiki/Kerberos_(protocol)