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Complement of the sum of words

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UDP and TCP use 1's complement for their checksums. Suppose you have the following three 8-bit words: 11010101, 01111000, 10001010. What is the 1's complement of the sum of these words? Show all work. Why UDP takes the 1's complement of the sum, that is, why not just use the sum?

Reference no: EM131233407

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