The controller is the core component of SDN. The controller connects to the device through the southbound interface. Which of the following belong to the controller southbound protocol? (Multiple Choice)

Apply the ACL configured as shown in the figure in Telnet. Only the device with the IP address of 172.16.105.2 is allowed to log in remotely:
#
acl number 2000
rule 5 permit source 172.16.105.2 0
#

The network administrator configures the Huawei router RTA as shown in the figure. If a user needs to be authenticated in the authentication domain "huawei", the correct description below is ().
[RTA]aaa
[RTA-aaa]domain Huawei
RTA-aaa-domain-huawei]authentication-s cheme aul
[RTA-aaa-domain-huawei]authentication-scheme au2

RADIUS is a common protocol to implement AAA.

A network engineer prompts the following information when entering the command line:
Error: Unrecognized command found at ' ^ ' position. Which of the prompt information is correct?