如何计算两个IP之间的主机数量？ C＃ [英] How to calculate number of hosts between two ips? c#

问题描述

我有两个ip：

1. 1.1.1.1
2. 4.4.4.4

显然，这只是一个例子，这是动态计算器

obviously this is just an example, this is a dynamic calculator

如果子网掩码不相关，我如何计算上述ips之间的主机数量？

how do i calculate number of hosts between said ips if subnet mask is irrelevant?

推荐答案

要计算（理论上的）IP地址的数量，您可以将每个IP地址转换为32位整数格式（实际上就是它的真正含义），那么这只是简单的减法即可：

To calculate the number of (theoretical) IP addresses you would convert each IP address to it's 32 bit integer format (which is actually what it really is), then it's just a matter of simple subtraction:

1.1.1.1 = 0x01010101 = 16843009
4.4.4.4 = 0x04040404 = 67372036

不包括起始地址和结束地址的地址数：

Number of addresses excluding the start and end address:

67372036 - 16843009 - 1 = 50529026

地址数，包括开始和结束地址：

Number of addresses including the start and end address:

67372036 - 16843009 + 1 = 50529028

实际可用地址的数量会少一些。通常每个C范围中的一些地址都用于网关（路由器）之类的东西。

The number of actual usable addresses would be somewhat lower. Normally a few addresses in each C range is reserved for things like the gateway (router).

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