1. 1480 byte IPv6 Packet VersionFlow Label Payload Length = 1440Hop Limit Source Address Destination Address 1440 Octets of Data Type of Service Next Header VersionIHLTotal Length = 1500 IdentificationFragment Offset = 0 Time To Live Tunnel Source Address Tunnel Destination Address 1480 Octet IPv6 Packet Protocol= 41Header Checksum Type of Service 000 1500 byte IPv6 in IPv4 Tunnel Packet VersionFlow Label Payload Length = 1440Hop Limit Source Address Destination Address 1440 Octets of Data Type of Service Next Header 1500 byte IPv6 Packet VersionFlow Label Payload Length = 1460Hop Limit Source Address Destination Address 1460 Octets of Data Type of Service Next Header ICMPv6 Packet too big IPv6 in IPv4 tunnel MTU 1500 X

2. VersionFlow Label Payload Length = 1460Hop Limit Source Address Destination Address 1460 Octets of Data Type of Service Next Header 1st Fragment 2nd Fragment Original IPv6 Packet VersionFlow Label Payload Length = 1240Hop Limit Source Address Destination Address 1232 Octets of Data Type of Service IPv6 Fragmentation MTU=1280 IPv6 Fragmentation MTU=1280 Identification=1956 Next Header=44 ReservedFragment Offset=0Res 1 Next Header VersionFlow Label Payload Length = 276Hop Limit Source Address Destination Address 228 Octets of Data Type of Service Identification=1956 Next Header=44 ReservedFragment Offset=154Res 0 Next Header

3. IPv6 domain IPv4 domain 6to4 Client Dual Stack Service 6to4 inbound relay server 192.88.99.1 6to4 outbound relay server 2002::/16

4. IPv6 domain IPv4 domain 6to4 Client Dual Stack Service 6to4 inbound relay server 192.88.99.1 6to4 outbound relay server 2002::/16