IBM REDP-4285-00 ユーザーズマニュアル
Chapter 1. Understanding the Linux operating system
31
Draft Document for Review May 4, 2007 11:35 am
4285ch01.fm
Figure 1-27 TCP 3-way handshake
The state of a connection changes during the session. Figure 1-28 on page 32 show the
TCP/IP connection state diagram.
TCP/IP connection state diagram.
Client
Server
SYN_SENT
LISTEN
SYN_RECV
ESTABLISHED
ESTABLISHED
SYN
SYN+ACK
ACK
FIN
ACK
FIN
ACK
TCP session established
FIN_WAIT1
FIN_WAIT2
receive FIN
send SYN
receive SYN
receive SYN+ACK
receive ACK
receive ACK
receive FIN
TIME_WAIT
send ACK
receive ACK
CLOSE_WAIT
reveive FIN
LAST_ACK
CLOSED
receive ACK
SYN＋ACK sent
receivr FIN
CLOSED
TimeOut