Exercise 1 (20 points) Suppose that a message 1010 1101 1010 0101 is transmitted using Internet Checksum (4-bit word). What is the value of the checksum? An n-bit Internet Checksum is computed as follows: 1) Break the stream of bits in n-bit words W1, W2, ..., and Wm: 2) Compute the n-bit word S = W1 + W2, if there is a carry then set S = 5+1 3) Compute S = S + W3, if there is a carry then set S = 5 + 1 n) Compute S = S + Win, if there is a carry then set S = 5 + 1 Finally, the Internet Checksum = ~5 (one-complement of S)