Assume a word size of 4 bits; derive the Internet checksum for the string 1101 1100...
Assume a word size of 4 bits; derive the Internet checksum for the string 1101 1100 1001 1001 0100 1111.
Homework Answers
Below are the 4-bit words given and the sum when we add all of them :
1101
1100
1001
1001
0100
1111
--------------------------
111110
( break the sum into 4-bit words and add them again as below until we get a single 4-bit word )
1110
11
---------------------------
10001 ( do again same thing as above )
0001
1
---------------------------
0010
(Take 1’s compliment for this then we will get the checksum )
1101 (This is the checksum value)
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