Router(config)#aaa server?

What is a possible reason for the error message?

Router(config)#aaa server?% Unrecognized command

A. The command syntax requires a space after the word “server”

B. The command is invalid on the target device

C. The router is already running the latest operating system

D. The router is a new device on which the aaa new-model command must be applied before continuing

View Answer

Answer: D

Explanation:

Before you can use any of the services AAA network security services provide, you must enable AAA.

Source: http://www.cisco.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfaaa.html