传输ControlProtocoIETFRFC 793 osiudp Internetprotocol suiteTCPIPIP
16
32 32 4 tcp4
, 6 urgurgentpointer AcknowledgmentNumber
PushRSTTCP
SYNTCP TCP
16 TCP
16 urgsequence数
SYN
, SYN , ACK TCP
SYNSEQ=xSYN_SEND
SYNSYN SEQ=废话(ACK=x + 1
SYNACK (ACK=y + 1建立
TCP
TCPhalf-close
关闭”“活跃closeTCPFIN
FIN ”“passivecloseFINTCP FINend-of-fileFIN
closeTCPFIN FINTCPFIN
FINACK4
TCP
TCP
TCP
TCPSYNSYN + ACKACK
SYNSYN + ACKSYN
SYNSYN + ACKACKSYN SYNSYNTCP
