27. Refer to the exhibit. Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will
Switch-1 do with this data?
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A. Switch-1 will drop the data because it does not have an entry for that MAC address.
B. Switch-1 will flood the data out all of its ports except the port from which the data originated.
C. Switch-1 will send an ARP request out all its ports except the port from which the data originated.
D. Switch-1 will forward the data to its default gateway.
Answer: B
解释:当交换机转发数据包时,首先要查看的就是自己的MAC 地址表,如果地址表里面有相对应的条目
交换机就会按照条目所对应的接口准确转发,但是如果找不到所对应的条目,交换机会把这个数据
包进行泛洪(flood),根据这个原理,我们不难发现,题目中switch-1要转发的数据包在自己的MAC 地址
表里面是找不到条目的,所以答案B是正确的,会flood
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