 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
• |
There are a bunch
of control flags:
|
|
|
|
• |
URG: urgent data
included.
|
|
|
|
• |
ACK: this segment
is (among other things)
|
|
an
acknowledgement.
|
|
|
|
• |
RST: error –
connection must be reset.
|
|
|
|
• |
SYN: synchronize
Sequence Numbers
|
|
|
(setup)
|
|
|
|
• |
FIN: polite
connection termination.
|
|