I'm an university student majoring in computer science & engineering as a sophomore.
I'm studying about TCP(transport layer) specifically, sequence number. What my materials of Network says sequence number is 'byte stream 'number' of first byte in segment's data'. As I know Operating System decides sequence number randomly but properly.
But I do not understand what 'byte stream number of first byte'.
Is it the value of ID for each byte?
Is it the record saying 'until me(byte), it's n(bytes) of total bytes''?