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Que. In an IP packet, header checksum computes:
a. 1’s complement sum of 16 bit words in the header without data field
b. 2’s complement sum of 16 bit words in the header without data field
c. 1’s complement sum of 16 bit words in the header including data field
d. 2’s complement sum of 16 bit words in the header including data field
Answer:1’s complement sum of 16 bit words in the header without data field
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