, .
, , . , .
, (sequence number) . , - , . . - (acknowledgement, A) (. 40).
, . , - . , .
. , , (protocol port number). , F- -, .
0 65536. .
. (socket) . , , : IP-c , ( UDP ) , .
. . , 256, .
FTP | |
Telnet | |
(DNS) | |
NetBIOS |
. - . , , , . (. 41)
1. - , (SYN).
2. - , ; :
- ;
- , ] , (sequence number);
- , , .
-
. 41
3. ] (acknowledgement number).
. , .
|
|
. , (sliding windows). / IP- : , . , .
-. - . -.
Sourse Port ( ) | - |
Destination Port ( ) | -. |
Sequence Number ( ) | . |
Acknowledgement Number ( ) | , |
Data Length ( ) | - |
Reseved () | |
Flags () | |
Windows () | , |
Checksum ( ) | , |
Urgent Pointer ( ) | ( Flags), |