可能重复: 子网是如何工作的?
我有点困惑,我得到了一个地址132.132.0.0/16,我必须设计一个允许至少396个子网的方案。我认为我必须扩展子网掩码才能做到这一点,我已经研究过不同的可能掩码,而掩码/25给了我一个可能的512个子网,这符合我将要使用的标准。由于还有9位,为了查找每个子网掩码的主机数,我使用公式2^9 = 128台主机,因此子网掩码0的第一个地址是
子网0- 132.132.0.0,地址范围为132.132.0.1 - 132.132.0.126,广播为132.132.0.127
子网1-132.132.0.128,地址范围为132.132.0.129 - 132.132.0.254,广播为132.132.0.255
子网2-132.1.0,地址范围为132.132.1.1 - 132.132.1.126,广播为132.132.1.127
子网350 -如果我知道要用两个子网来填充第四个八进制,我是否只取350-1(因为我们从0子网开始),它给我们349/2,给我们174.5,所以地址id是132.132.174.128,地址范围是132.132.174.129 - 132.132.174.254,广播是132.132.175.255。
这是正确的吗?
谢谢
发布于 2011-07-19 20:23:54
Network Net Broadcast CIDR Mask UsableHosts
132.132.0.0 132.132.31.255 19 255.255.224.0 8,190 Available
132.132.32.0 132.132.47.255 20 255.255.240.0 4,094 Available
132.132.48.0 132.132.55.255 21 255.255.248.0 2,046 Available
132.132.56.0 132.132.57.255 23 255.255.254.0 510 Available
132.132.58.0 132.132.58.127 25 255.255.255.128 126
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132.132.215.0 132.132.215.127 25 255.255.255.128 126
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132.132.218.128 132.132.218.255 25 255.255.255.128 126
132.132.219.0 132.132.219.127 25 255.255.255.128 126
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132.132.221.0 132.132.221.127 25 255.255.255.128 126
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132.132.222.128 132.132.222.255 25 255.255.255.128 126
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132.132.247.0 132.132.247.127 25 255.255.255.128 126
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132.132.248.0 132.132.248.127 25 255.255.255.128 126
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132.132.249.0 132.132.249.127 25 255.255.255.128 126
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132.132.250.0 132.132.250.127 25 255.255.255.128 126
132.132.250.128 132.132.250.255 25 255.255.255.128 126
132.132.251.0 132.132.251.127 25 255.255.255.128 126
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132.132.252.0 132.132.252.127 25 255.255.255.128 126
132.132.252.128 132.132.252.255 25 255.255.255.128 126
132.132.253.0 132.132.253.127 25 255.255.255.128 126
132.132.253.128 132.132.253.255 25 255.255.255.128 126
132.132.254.0 132.132.254.127 25 255.255.255.128 126
132.132.254.128 132.132.254.255 25 255.255.255.128 126
132.132.255.0 132.132.255.127 25 255.255.255.128 126
132.132.255.128 132.132.255.255 25 255.255.255.128 126https://serverfault.com/questions/291978
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