Field | Bits | Description |
Source Port | 16 | Ãâ¹ßÁöÀÇ Æ÷Æ®¹øÈ£ |
Destination Port | 16 | ¸ñÀûÁöÀÇ Æ÷Æ®¹øÈ£ |
Sequence Number | 32 | ÆÐŶÀÇ ¼ø¼Á¤º¸·Î ÃÖÃÊ Åë½ÅÀ» ¿¬°á(Connect)ÇÒ¶§
·£´ý(Random)°ªÀ» ÃʱⰪÀ» Á¤ÇÏ¿© ÆÐŶÀ» ¹ß¼ÛÇÒ¶§¸¶´Ù 1¾¿ Áõ°¡½ÃŰ°Ô µÈ´Ù. |
Acknowledgement Number | 32 | ´ÙÀ½¹ø ¼ö½ÅÇÒ Seq. NoÀÇ ¹øÈ£·Î
¾Õ¼ ¼ö½ÅÇÑ ÆÐŶÀÇ Seq. No¿¡ 1À» ´õÇѰªÀÌ µÇ¸ç, À̸¦ ¼ö½ÅÅëÁö·Î º»´Ù. |
Data Offset | 4 | 4BytesÀÇ ¹è¼ö·Î TCP¸Þ½ÃÁö º»Ã¼(Data)ÀÇ ½ÃÀÛÀ§Ä¡
±âº»ÀûÀ¸·Î OptionÀÌ ¾ø´Â°æ¿ìÀÇ Çì´õ»çÀÌÁî°¡ 20ByteÀ̹ǷÎ, 5( 4 x 5 = 20 )ÀÌ µÈ´Ù. |
Reserved | 6 | ¿¹¾àµÊ(0À¸·Î ÃʱâÈ) |
Flags | 6 | Á¦¾î¿ë Ç÷¡±×(Control Flags) 1:On, 0:Off
- URG: Urgent Pointer field significant
- ACK: Acknowledgment field significant
- PSH: Push Function
- RST: Reset the connection
- SYN: Synchronize sequence numbers
- FIN: No more data from sender
|
Window | 16 | ¼ö½Å°¡´ÉÇÑ µ¥ÀÌÅÍÀÇ »çÀÌÁî |
Checksum | 16 | µ¥ÀÌÅÍ È®Àοë üũ°ª |
Urgent Pointer | 16 | ±ä±ÞÇÏ°Ô Ã³¸®ÇؾßÇÒ Seq. No¸¦
°¡¸®Å°°Ô µÇ¸ç, URG Ç÷¡±×°¡ ¼³Á¤µÇ¾î¾ß ÇÑ´Ù. |
Options | 24 | ¼º´ÉÇâ»óÀ» À§ÇÑ °¡º¯±æÀÌÀÇ Ãß°¡¿É¼Ç(RFC793ÂüÁ¶) |
Padding | 6 | TCPÇì´õÀÇ ±æÀ̸¦ 32bitÀÇ ¹è¼ö·Î ¸¸µé¾îÁØ´Ù.(0°ª»ç¿ë) |
Data | °¡º¯ | ½ÇÁ¦ µ¥ÀÌÅÍ |