ISRO | ISRO CS 2020 | Question 37

Checksum field in TCP header is
(A) ones complement of sum of header and data in bytes
(B) ones complement of sum of header, data and pseudo header in 16 bit words
(C) dropped from IPv6 header format
(D) better than md5 or sh1 methods

Answer: (B)

Explanation: So, the TCP checksum includes the:-

  1. Pseudo IP header
  2. TCP header
  3. TCP body

Option (B) is correct.

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