IPv和IP报头比较 IPv4 Packet header IPv6 Packet header Service Traffic Ver HL Type Total Length Class Flow Label Next Identification Flags Offset Payload Length Hop Header Limit TTL Protocol Header Checksum Source Address Source Address Destination Address Options Padding 32 bits Destination AddressDestination Address Source Address Ver IHL Service Type Identification Flags Offset TTL Protocol Header Checksum Source Address Destination Address Options + Padding Total Length Ver Flow Label Payload Length Next Header Hop Limit Traffic Class 32 bits IPv4 Packet Header IPv6 Packet Header IPV6和IPV4报头比较