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單項選擇題

Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?（）

A.show running-config
B.show processes cpu
C.debug all
D.logging host ip address

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單項選擇題

哪個命令可以在交換機(jī)啟用RSTP？（）

A. spanning-tree mode rapid-pvst
B. spanning-tree uplinkfast
C. spanning-tree backbonefast
D. spanning-tree mode mst

單項選擇題

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

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