I was reading an article about the topic and I came across this :"During connection establishment each party uses a Random number generator to create initial sequence number (ISN), which is usually different in each direction. We know that a TCP sequence number is 32 bit. So it has finite (from 0 to (232-1) = 4 Giga sequence numbers) and it means we will be able to send only 4GB of data with unique sequence number not more than that".
I do not see the correlation with ISN and being able to send only 4GB of data with unique sequence number. Also, how does this relate to the wrap around concept? I would appreciate a better explanation. Thanks in anticipation.