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多項(xiàng)選擇題What are three valid reasons to assign ports to VLANs on a switch？（）

A.to make VTP easier to implement
B.to isolate broadcast traffic
C.to increase the size of the collision domain
D.to allow more devices to connect to the network
E.to logically group hosts according to function
F.to increase network security

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1.單項(xiàng)選擇題 請(qǐng)參見圖示，主機(jī)A ping接口S0/0的router3，什么是該ping的TTL值？（）

A. 253
B. 252
C. 255
D. 254

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2.單項(xiàng)選擇題Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）

A.spanning-tree backbonefast
B.spanning-tree uplinkfast
C.spanning-tree portfast
D.spanning-tree cost512

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3.多項(xiàng)選擇題 Refer to the exhibit.The network shown in the diagram is experiencing connectivity problems. Which of the following will correct the problems？（）

A.Configure the gateway on Host A as 10.1.1.1.
B.Configure the gateway on Host B as 10.1.2.254.
C.Configure the IP address of Host A as 10.1.2.2.
D.Configure the IP address of Host B as 10.1.2.2.
E.Configure the masks on both hosts to be 255.255.255.224.
F.Configure the masks on both hosts to be 255.255.255.240.

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4.單項(xiàng)選擇題Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over FastEthernet?（）

A.802.3ad
B.802.1w
C.802.1Q
D.802.1d

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5.單項(xiàng)選擇題Which command helps a network administrator to manage memory by displaying flash memory andNVRAM utilization?（）

A.show secure
B.show file systems
C.show flash
D.show version

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