Refer to the exhibit. What is the result of this configuration?

Question

Exhibit

Options

• ARouter 1 opens and closes a TCP connection to the TACACS+ server every time a user requires
• BRouter 1 and the TACACS+ server maintain one open connection between them only when
• CRouter 1 and the TACACS+ server maintain one open connection between them.
• DRouter 1 opens and closes a TCP connection to the TACACS+ server every time a user requires

• A
  4% (2)
• B
  2% (1)
• C
  89% (48)
• D
  6% (3)

Explanation

The exhibit shows a TACACS+ configuration that includes the 'single-connection' keyword. By default, a router opens a new TCP connection to the TACACS+ server for each AAA transaction (authentication, authorization, or accounting request) and closes it when the transaction is complete. When 'single-connection' is configured, the router and TACACS+ server establish one persistent TCP connection that remains open and is reused for all subsequent AAA transactions. This reduces the overhead of repeatedly establishing and tearing down TCP connections, improving performance in environments with frequent authentication events. Choices A and D describe the default (non-single-connection) behavior, and choice B incorrectly limits the connection to only 'when needed.'

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