Network IP address of the median

Web address is 121.201.0.0 median:17
121.204.0.0/14
121.224.0.0/12
121.32.0.0/14
121.36.0.0/17
121.36.128.0 / 18
121.40.216.0/21
121.40.224.0/20
122.0.128.0/17

on the back to see how that is the median?

such as:
121.204.0.0/14

32-bit address / 14-bit mask.121.201.0.0 17, that is, Your subnet mask is a former 17, and the IPV4 address and subnet mask are 32-bit, 1-bit subnet mask for the corresponding IP address of the network are, above can be written in the 121.201.0.0 / 17, is the reason
you would like to clarify IPV4 to address the school about it, the more comprehensive / 25671063/blog/item/964d794f484d9fcdd1c86ac5.html behind the mask is the median?
255.255.255.0 is because 24-bit It is converted into 2-band
11111111 11111111 11111111 00000000
255.255.0.0 is 16,
11111111 11111111 00000000 00000000
mask the fact is then converted into a binary number is how many there are a few Bit! ip equivalent to the Web site, equivalent to slash the back of the folder
equivalent to the following Web site in the / browse, and so on
zhidao.baidu.com / browse

set up such a method frequently Found in the company's server settings