单项选择题

A、1
B、-1
C、0
D、2

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多项选择题

While troubleshooting connectivity issues, you log into a remote router. From there,you wish to see the layer 1 and layer 2 status of the interfacE.Which of the following IOS commands would you issue to check the current IP addressing, as well as theyer 1 and layer 2 status of an interface?（）A.TK1# show versionB.TK1# show protocolsC.TK1# show interfacesD.TK1# show controllersE.TK1# show ip interfaceF.TK1# show startup-config

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voltage－gated channels (电位－门控通道)

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