單項(xiàng)選擇題

Which type of cable is used to connect the COM port of a host to the COM port of a router or switch?（）

A. crossover
B. straight-through
C. rolled
D. shielded twisted-pair

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單項(xiàng)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

單項(xiàng)選擇題

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

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