子网掩码位数如192.168.1.1192.168.1.255255.255.255.0可以写成192.168.1.1/24但是现在有N多条,要如何计算出子网掩码的位数呢?例如下面的都是只知道IP段但是不知道子网掩码.58.32.0.058.63.161.25558.155.14

Question

子网掩码位数
如 192.168.1.1 192.168.1.255 255.255.255.0 可以写成 192.168.1.1/24
但是现在有N多条,要如何计算出子网掩码的位数呢?例如下面的都是只知道IP段但是不知道子网掩码.
58.32.0.0 58.63.161.255
58.155.148.0 58.155.151.255
58.208.0.0 58.223.255.255
58.246.242.0 58.246.250.255
59.32.0.0 59.63.231.255
59.172.0.0 59.175.255.255
60.21.212.9 60.21.212.23
60.29.11.0 60.29.11.255
60.160.0.0 60.191.255.255
60.194.0.0 60.195.255.255
60.235.0.0 60.235.255.255
61.49.121.0 61.51.125.255
61.128.0.0 61.134.95.255
61.136.64.0 61.147.255.255
61.150.0.0 61.161.127.255
61.164.0.0 61.167.27.30
61.169.0.0 61.175.255.255
61.177.0.0 61.191.255.255
61.232.235.0 61.232.235.255
61.235.21.0 61.236.68.255
61.241.181.142 61.241.231.75
116.1.0.0 116.1.255.255
116.4.0.0 116.11.255.255
116.16.0.0 116.31.255.255
116.52.0.0 116.55.255.255
116.70.49.0 116.70.49.255
116.192.0.0 116.192.255.255
116.207.0.0 116.212.175.255
116.215.14.0 116.215.26.255
116.224.0.0 116.239.255.255
116.242.0.0 116.243.255.255
116.246.0.0 116.249.255.255
116.252.0.0 116.253.255.255
117.21.0.0 117.45.255.255
117.57.0.0 117.57.255.255
117.60.0.0 117.71.255.255
117.79.144.0 117.95.255.255

Answer 1

192.168.1.1 192.168.1.255 255.255.255.0 可以写成 192.168.1.1/24
后面的数24是网络标识
117.79.144.0 117.95.255.255 这两个ip只在同一子网内的
而网络标识的作用就是区分是否在同一子网
把它化为二进制形式 你看他们前面有几位相同就ok了
117.79.144.0这是起始ip 117.95.255.255这是最后ip
把它化为二进制形式
117.79.144.0
0111111 01001111 10010000 00000000
117.95.255.255
00111010 01011111 11111111 11111111
所以117.79.144.0/11
其他的算法一样
如果哪里不懂 你call我就好了