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  3. Which of the following are benefits of VLANs?

Which of the following are benefits of VLANs?

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问题 Which of the following are benefits of VLANs?
选项 A、        They increase the size of collision domains．
B、        They allow logical grouping of users by function．
C、        They can enhance network security．
D、        They increase the size of broadcast domains while decreasing the number of collision domains．
E、        They increase the number of broadcast domains while decreasing the size of the broadcast domains．
答案B,C,E
解析 考查VLAN的特点
A：增加冲突域的大小，错误
B：允许逻辑划分网段，正确
C：增强网络安全，正确。不同vlan不能直接通信。
D：当减少冲突域时增加广播域的大小。错误
E：减少广播域的大小时增加了广播域个数。正确。
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