Homework Answers
In question, it mentioned 4-bit checksum, So we need to divide the message into 4 bit words and then add all.
1001 + 1100 + 1010 + 1100 = 100110 (binary addition)
We want 4-bit checksum, So bring 10 down and add
0110 + 10 = 1000 (binary addition)
And checksum will be the complement of 1000, which is
0111.
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