多项选择题
A.show inventory
B.show flash：filesys
C.dirflash：include chassis
D.show diag
E.show controllers
多项选择题 Which two statements are characteristics of a distance vector routing protocol?（）
多项选择题 The network technician is planning to use the 255.255.255.224 subent mask on the network.which three valid IP addresses can the technician use for the hosts?（）
多项选择题 A network administrator needs to configure port security on a switch.which two statements are true?（）