下面的IP地址中，不属于同一网络的是（ ）
- A.172.20.34.28/21
- B.172.20.39.100/21
- C.172.20.32.176/21
- D.172.20.40.177/21
正确答案及解析
正确答案
D
解析
可以根据掩码长度21位计算出选项A到选项D对应的网络地址范围，21位掩码对应的值网规模为8，选项A所在的地址范围172.20.32.0~172.20.39.255,这个地址范围包括了选项B和选项C,因此只有选项D不属于同一网络
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