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單項選擇題

Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?（）

A. BackboneFast
B. UplinkFast
C. Root Guard
D. BPDU Guard
E. BPDU Filter

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單項選擇題

How many bits are contained in each field of an IPv6 address?（）

A. 24
B. 4
C. 8
D. 16

單項選擇題

For which type of connection should a straight-through cable be used?（）

A. switch to switch
B. switch to hub
C. switch to router
D. hub to hub
E. router to PC

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