What is the size in bytes of the TCP sequence number in the header?

What is the size in bytes of the TCP sequence number in the header?
A . 2
B . 1
C . 3
D . 4

Answer: D

Explanation:

In the Transmission Control Protocol (TCP) header, the sequence number field is crucial for ensuring the correct sequencing of the packets sent over a network.

The sequence number field in the TCP header is 32 bits long, which equates to 4 bytes.

This sequence number is used to keep track of the bytes in a sequence that are transferred over a TCP connection, ensuring that packets are arranged in the correct order and data integrity is maintained during transmission.

Reference

Postel, J., "Transmission Control Protocol," RFC 793, September 1981.

"TCP/IP Guide," Kozierok, C. M., 2005.