IP TCP UDP 结构

[come from: http://www.cnblogs.com/davidlili/archive/2006/08/29/489918.html]

IP TCP UDP 结构
IP Header Format : RFC 791

The IP header structure is as follows:

4	8	16	32 bits
Ver.	IHL	Type of service	Total length
Identification	Flags	Fragment offset
Time to live	Protocol	Header checksum
Source address
Destination address
Option + Padding
Data
IP header structure

IPV6 :



The IPv6 header structure is as follows:

4	4	16	24	32 bits
Ver.	Priority	Flow label
Payload length	Next header	Hop limit
Source address (128 Bits)
Destination address (128 bits)
IPv6 header structure

TCP Header Format : RFC 793

The TCP header structure is as follows:

16	32 bits
Source port	Destination port
Sequence number
Acknowledgement number
Offset	Resrvd	U	A	P	R	S	F	Window
Checksum	Urgent pointer
Option + Padding
Data
TCP header structure

The UDP header structure is shown as follows:

16	32 bits
Source port	Destination port
Length	Checksum
Data
UDP header structure