单项选择题 You want the text "Unauthorized access prohibited!" to be displayed before the login prompt every time someone tries to initiate a Telnet session to a router, as shown in the example below: Which command can be used to configure this message?（）

多项选择题 The TestKingA router is configured as shown below: TestKingA(config)# interface loopback 0 TestKingA(config-if)# ip address 192.168.16.24 255.255.255.255 As a result of this change, which of the statements below are true?（）

单项选择题 A CCNA candidate is working on a 2600 Cisco router. The person needs to verify that the configuration register is set to boot the router IOS from flash memory and use the commands saved in the startup-configuration file. Which command will display this information, and what is the configuration register value that should be displayed?（）