IP地址的基本换算实例

    IP地址:

        00000000. 00000000. 00000000. 00000000         11111111. 11111111. 11111111. 11111111         0.0.0.0   -  255.255.255.255

    A类:      前八位第一位为0IP地址,为A类:

        00000001.0.0.0         01111111.255.255.255
         子网掩码:     255.0.0.0                        11111111.00000000.00000000.00000000
        10.0.0.1         255.255.255.0
         1.0.0.0                        126.255.255.255
         A类:      网段数:  27  只有126个网段                     主机数:  224C2=16777216-2= 166777214
 127.0.0.1                  B类:前八位用10开头的,为B类:                 10000000.0.0.0                 10111111.255.25.255
         128.0.0.0          191.255.255.255          子网掩码:255.255.0.0
         B类:网段数: 214  16384个网段               主机数:  216C2 =65536-2 = 65534
        C类:前八位用110开头,为C类              11000000.0.0.0              11011111.255.255.255                 192.0.0.0               223.255.255.255                192.168.216.250              255.0.0.0                子网掩码:255.255.255.0
         C类:网段数:221               主机数:28 -2 = 256-2 =254
        D类:前八位用1110开头,为D类                 11100000.0.0.0                 11101111.255.255.255                    224.0.0.0                  239.255.255.255
        E类:前八位用1111开头,为E类                 11110000.0.0.0                 11111111.255.255.255            240.0.0.0          255.255.255.255
        私有IP地址:                  A:10.0.0.0- 10.255.255.255                     255.0.0.0                  B:172.16.0.0 -172.31.255.255                     255.255.0.0                  C:192.168.0.0 - 192.168.255.255                     255.255.255.0

    总结:

                 1、可用IP地址分为ABC三类

                 2、每个类别的IP地址中,都有一部分私有IP地址

                 3、子网掩码必须和IP地址成对出现

                 4、每个网段都有默认子网掩码,用来区分网络位和主机位

     子网掩码划分:

         如果子网掩码是1,那么和他对应的IP地址代表网络位

         如果子网掩码是0,那么和他对应的IP地址代表主机位

         子网掩码只要是连续的1,就可用

       192.168.1.100  11000000.10101000.00000001.01100100     /26         255.255.255.128  11111111.11111111.11111111.10000000          子网划分:                    21网段数 2                    主机数:27  =128                    此IP的网络地址:192.168.1.0                    此IP的广播地址:192.168.1.127           192.168.1.100 11000000.10101000.00000001.01100100         255.255.255.192  11111111.11111111.11111111.11000000             11000000.10101000.00000001.01000000     192.168.1.64             11000000.10101000.00000001.01111111     192.168.1.127                    网段数:2 2次方=  4                    主机数:26-2 = 64-2 = 62                    网络地址:192.168.1.64                    广播地址:192.168.1.127           1       1      1         1       0      0         0       1      0         0       0      0
    子网掩码计算公式:              网络地址:     把IP地址和子网掩码的二进制相与,得到的就是网络地址              广播地址:     子网掩码中有几个0,就把IP地址的对应位数换成1,得到的就是广播地址              网段数:         在有效子网中,有n个1,网段数是2的n次方              主机数:         在有效子网中,有m个0,主机数就是2的m次方减2
    192.168.1.213  11000000.10101000.00000001.11010101     255.255.255.240 11111111.11111111.11111111.11110000     网络地址:11000000.10101000.00000001.11010000  192.168.1.208     广播地址:11000000.10101000.00000001.11011111   192.168.1.223     网段数:  2*4   =  16     主机数:  2*4 -2  =  14       192.168.1.139   11000000.10101000.00000001.10001011     255.255.255.248  11111111.11111111.11111111.11111000     网络地址:11000000.10101000.00000001.10001000  192.168.1.136     广播地址:11000000.10101000.00000001.10001111  192.168.1.143     网段数:2*5  =     32     主机数:2*3-2=6       192.168.1.179                       255.255.255.252 11111111.11111111.11111111.11111100          网络地址:192.168.1.176          广播地址:192.168.1.179          网段数:2*6 = 64          主机数:2*2 - 2 = 2       192.168.1.97 11000000.10101000.00000001.01100001     255.255.254.0 11111111.11111111.11111110.00000000     .网络地址:11000000.10101000.00000000.00000000  192.168.0.0     广播地址: 11000000.10101000.00000001.11111111  192.168.1.255     网段数:2*7     主机数:2*9-2        172.16.0.0  11111110.00010000.00000000.00000000      255.255.254.0  11111111.11111111.11111110.00000000          网络地址位:11111110.00010000.00000000.00000000  172.16.0.0          广播位: 11111110.00010000.00000001.11111111  127.16.1.255          网络位: 215          主机位: 29-2   61.1.1.1 255.255.255.240 子网掩码表格: 11111111.11111111.11111111.00000000  二进制              十进制          网段数              主机数 00000000         255.255.255.0       1                   254 10000000         255.255.255.128     2                   126 11000000         255.255.255.192     4                    62 11100000         255.255.255.224     8                    30 11110000         255.255.255.240     16                   14 11111000         255.255.255.248     32                   6 11111100         255.255.255.252     64                   2   10.168.211.49  00001010.10101000.11010011.00110001 255.240.0.0    11111111.11110000.00000000.00000000          网络地址位:00001010.10100000.00000000.00000000  10.160.0.0          广播位:00001010.10101111.11111111.11111111     10.175.255.255          网络位:212          主机位:220-2   172.16.199.217  10100010.00010000.11000111.11011001 255.255.224.0   11111111.11111111.11100000.00000000          网络地址位:10100010.00010000.11000000.00000000  172.16.192.0          广播地址位:10100010.00010000.11011111.11111111  172.16.223.255          网络位:23          主机位:213-2 172.16.205.168  10100010.00010000.11001101.10101000. 255.255.255.240 11111111.11111111.11111111.11110000          网络地址位:10100010.00010000.11001101.10100000127.16.205.160          广播地址位:10100010.00010000.11001101.10101111127.16.205.175          网络位:24          主机位:24-2 192.168.1.167  11000000.10101000.00000001.10100111 255.255.248.0  11111111.11111111.11111000.00000000          网络位地址:11000000.10101000.00000000.00000000  192.168.0.0          广播位:11000000.10101000.00000111.11111111  192.168.7.255          网络位:25          主机位:211-2

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