What is a possible reason for the error message?Router(config)#aaa server?% Unrecognized command

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