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