单项选择题
Which command encrypts all plaintext passwords?（）
A.Router(config)#password-encryption B.Router(config)#service password-encryption C.Router#service password-encryption D.Router# password-encryption
单项选择题 Which command enables IPv6 forwarding on a cisco router?（）
多项选择题 What are three features of the IPV6 protocol?（）
多项选择题 A network administrator needs to configure port security on a switch.which two statements are true? （）
