IPV6和IPV4协议报文格式和功能比较 Group IPV4报头 20个字节+选项:13字段,包括3个指针 0 8 16 24 32 Ver IHL Service Type Total Length Identifier Flags Fragment Offset Time to live Protocol Header Checksum 32 bit Source Address 32 bit Destination Address Options and Padding 阴影部分是从Pv6报头中去掉的字段All Rights Reserved by BII Group IPv6和IPv4协议报文格式和功能比较 IPv4 报头 20 个字节+ 选项 : 13 字段, 包括3 个指针 0 32 Ver IHL Total Length Identifier Flags Fragment Offset 32 bit Source Address 32 bit Destination Address 4 8 16 24 Service Type Options and Padding Time to Live Protocol Header Checksum 阴影部分是从IPv6报头中去掉的字段