Exam 210-260 Question id=712 Secure Access

Refer to the exhibit.
tacacs server tacacs1 address ipv4 1.1.1.1 timeout 20 single-connection tacacs server tacacs2 address ipv4 2.2.2.2 timeout 20 single-connection tacacs server tacacs3 address ipv4 3.3.3.3 timeout 20 single-connection
Which statement about the given configuration is true?

A. The single-connection command causes the device to establish one connection for all TACACS transactions
B. The single-connection command causes the device to process one TACACS request and then move to the next server.
C. The timeout command causes the device to move to the next server after 20 seconds of TACACS inactivity.
D. The router communicates with the NAS on the default port, TCP 1645.
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