Flags
(6 bit)
Data
(variable)
Options +
padding (4)
Urgent
pointer (2)
Checksum (2)
Window (2)
Data
offset
Acknowledgment
number (4)
Sequence
number (4)
Destination
port (2)
Source port
(2)
Formato del pacchetto TCP
Flags:
(byte 14, tcp[13])
FIN
1
URG
6
ACK
5
PSH
4
RST
3
SYN
2
flag
bit