单项选择题
A.Authentication needs to be changed to PAP for both routers.
B.Serial IP addresses of routers are not on the same subnet.
C.Username/password is incorrectly configured.
D.Router names are incorrectly configured.
多项选择题 Exhibit: Which of the following are true regarding the command output shown in the display (Choose two.)（）。
单项选择题 A switch is configured as a vtp sever with a domain name of CCNA.Which cisco ios privileged mode command,followed by are load of the swith,will reset the VTP management domain name of the switch to a NULL value?（）
单项选择题 哪个路由协议默认用带宽和延迟作为metrics值？（）