[单选题]交换机上VLAN的功能描述中，正确的是（）

正确答案 ：B

可以减少广播对网络性能的影响

[多选题]下列哪一设备工作时，要用到OSI的七个层（一层到七层）（）

正确答案 ：ABC

PC

网管机

WEB服务器

解析：ABC

[单选题]You are an administrator of the Ezonexam switched network and your goal is to reduce some of the administrative overhead on your network. You plan on achieving this by configuring a new VLAN for each department in the Ezonexam network.However, you need to share the VLAN information across numerous switches. Which of the following would allow you accomplish this?

正确答案 ：D

VTP

解析：D 解析：Explanation:

[多选题]As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)

正确答案 ：BC

It encourages industry standardization by defining what functions occur at each layer of the model

It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting

解析：解析：Explanation:

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