Use one random IP for an example

68.25.193.25

128,64,32,16,8,4,2,1

Remember the Number

Take 68 for example: the first 128 is greater than 68, write 0,68 is greater than 64, subtract 4 backwards number The third digit is 4, can subtract all write 1, the other number write 0

as follows:

128,64,32,16,8,4,2,1

0, 1,0,0,1,0,0

This is 68's binary number

And 25's, 25 is greater than 16, it's always greater than 25, so before 16 both are 0,25 minus 16 is tantamount to 9,9 is greater than 8,8 is 1, 9 minus 8, you're left with 1, the last digit is 1

128,64,32,16, 8, 4, 2,1

0 0 0 1 1 0 0 1