Read and answer. 根据图表中的内容，完成后面的问题。

1. What are you doing?

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2. What is Amy doing?

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3. What is Daming doing?

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4. What is Lingling doing?

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5. What is Sam doing?

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现在需要为某网络设计VLAN，关于VLAN设计时比较好的建议是：（）

A.一般是在汇聚层来实现路由的功能

B.VLAN间的路由不应该设计在单个交换机上来实现

C.VLAN可以使单个交换机分成更多小的广播域

D.核心层关心流量高速转发，所有路由应该部署在接入层