Which TCP header field is primarily used to ensure reliable and ordered delivery of data?

Options

  • A. Urgent pointer
  • B. Sequence number
  • C. Window size
  • D. Source port
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. Sequence number

Detailed Explanation

Correct Answer: Sequence number.

TCP sequence numbers identify byte positions in the transmitted data stream. They help the receiver arrange data in the correct order and detect missing bytes.