IPV6和IPV4协议报文格式和功能比较 Group IPV6报头 40字节,8个字段 0 4 12 6 24 32 Version Class Flow Label Payload length Next header Hop limit 128 bit Source address 128 bit Destination AddressAll Rights Reserved by BII Group IPv6和IPv4协议报文格式和功能比较 IPv6 报头 40 字节, 8 个字段 0 32 Version Class Flow Label Payload Length Next Header Hop Limit 128 bit Source Address 128 bit Destination Address 4 12 16 24