UC知道一道CCNA VLAN中广播域的问题
来源：百度知道 编辑：UC知道 时间：2024/06/23 20:27:09
Which of the following are benefits of VLANs? (Choose three.)
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.
F. They simplify switch administration.
Answer: BCE
答案E，“它增加了广播域的数目，同时减少了广播域的大小”
这句话怎么理解，按理说不是应该减少广播域吗？
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.
F. They simplify switch administration.
Answer: BCE
答案E，“它增加了广播域的数目，同时减少了广播域的大小”
这句话怎么理解，按理说不是应该减少广播域吗？
VLAN是划分广播域的，所以当一个广播域被划分成多个VLAN时，一个VLAN就是一个广播域，广播域的数量增加了，但是范围减小了
就像一块地被划分成很多块，数量增加了，但是每块的面积比起整块地是小了很多
不是
VLAN的划分就是为了减小广播域
虽然广播域的数量增加 但每一个广播域的大小减小 所能引起的广播风暴的范围减小
也就相当于分流 化整为零