计算机相关网段计算

### 规则

ip:       00001010.00010101.11100000.00000000  10.21.224.0

子网掩码:  11111111.11111111.11111100.00000000   255.255.252.0

网络标识: 11111111.11111111.11100000.00000000   10.21.224.0


ip:         00001010.00010101.11100000.00000000  10.21.224.0

子网掩码取反: 00000000.00000000.00000011.11111111   0.0.3.255

广播地址:     00001010.00010101.11100011.11111111  10.21.227.255


ip地址段      10.21.224.1~10.21.227.254

案例一、172.19.208.0/20

ip:          10101100.00010011.11010000.00000000

子网掩码:     11111111.1111111.11110000.00000000

网络标识:     10101100.00010011.11010000.00000000 (172.19.208.0)

ip:          10101100.00010011.11010000.00000000

子网掩码取反:  00000000.00000000.00001111.11111111

广播地址:     10101100.00010011.11011111.11111111 (172.19.223.255)



案例二、172.19.96.0/20


ip:          10101100.00010011.01100000.00000000

子网掩码:     11111111.1111111.11110000.00000000

网络标识:     10101100.00010011.01100000.00000000 (172.19.96.0)

ip:          10101100.00010011.01100000.00000000

子网掩码取反:  00000000.00000000.00001111.11111111

广播地址:     10101100.00010011.01101111.11111111 (172.19.111.255)


案例三、172.19.120.0/24


ip:          10101100.00010011.01111000.00000000

子网掩码:     11111111.1111111.11111100.00000000

网络标识:     10101100.00010011.01111000.00000000 (172.19.120.0)

ip:          10101100.00010011.01111000.00000000

子网掩码取反:  00000000.00000000.00000011.11111111

广播地址:     10101100.00010011.01111011.11111111 (172.19.123.255)