2) Sending and receiving port (Port 9100 or Port 1024)
Host
CONNECT
(Port 1025 or Port 9100)
CONNECT
SUCCESS
Conne
ction
Status request
(Port 1025 or Port 9100)
Print Data
(Port 1025 or Port 9100)
CLOSE
(Port 1025 or Port 9100)
CONNECT END
Printer
LISTEN
ACCEPT
Printer status
(Port 1024 or Port 9100)
Printer operation
CLOSE
LISTEN
550