Q6 TCP SYN (b). What is it in this TCP segment that identifies the segment as a SYN segment?
The SYN bit is set to 1 in the "Flag" field in the TCP header.
The first segment in a TCP connection is always a SYN segment, so this segment is recognized as a SYN segment even though there is no explicit marking in this segment to indicate it is a SYN segment.
The TCP options field in the TCP header contains the ASCII characters "SYN", indicating that this is a SYN segment
The initial sequence number used is the sum of the ASCII values of the characters 'S', 'Y', and 'N', indicating that this is a SYN segment.