Help the for CRC
TRy to see the things this way
1 . Inverting a number is adding a Constant to it .
For 4 bit binary number we will be adding 1111 to invert the given no
e.g. Take 1011
when inverted 0100 (a)
Also : 1111
+ 1011
--------------------------
0100
Note it is Polynomial Arithmetic or Modulo 2 Arithmetic (There's no Concept of Carry
and Addition is same as Subtraction)
So by inverting Checksum we only are adding a Constant to it
This is all I could get
Hope it helps u
And I get a few more POINTS