Transport Layer - Panasonic DP-3510 Service Manual

9.4.

Transport Layer

9.4.1. TCP (Transmission Control Protocol)
The TCP (Transmission Control Protocol) is an internetwork connection-oriented protocol that corresponds
to the OSI Transport layer. TCP provides full-duplex, end-to-end connections. When the end-to-end
communication acknowledgement is not required, the UDP (User Datagram Protocol) can be substituted for
the TCP at the Transport (host-to-host) level. TCP and UDP operate at the same layer.
The UDP is a connectionless oriented protocol.
Header Length
(4 bit)
Ver. 5.2
IP Header TCP Header
(20 byte) (20 byte)
TCP Segment in IP Datagram
Source Port (2 byte)
Sequence Number (4 byte)
Acknowledgment Number (4 byte)
Reserved
Control Flag
(6 bit)
(6 bit)
Checksum (2 byte)
Option
TCP Segment Outline
TCP Header Monitoring Sample
DP-3510/3520/3530/4510/4520/4530/6010/6020/6030
IP Datagram
TCP segment
Application Data
(vary)
Destination Port (2 byte)
Urgent Pointer (2 byte)
Data (Segment)
439
Window (6 byte)
PAD
JAN 2006