单项选择题
A.show version B.show vlan C.show ip route
A.show startup-config B.show running-config C.show ip route
A.network 12.0.0.0 0.255.255.255 area 0 B.network 12.1.0.0 0.0.255.255 area 1 C.network 12.0.0.0 0.255.255.255 area 1 D.network 12.0.0.0 0.255.255.255
A.network 12.0.0.0 255.0.0.0 B.network 12.1.0.1 255.0.0.0 C.network 12.0.0.0 D.network 12.0.0.0 0.0.0.255
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