<Tr> <Th> 12 </Th> <Th> 96 </Th> <Td_colspan="16"> Source Port </Td> <Td_colspan="16"> Destination Port </Td> </Tr> <Tr> <Th> 16 </Th> <Th> 128 </Th> <Td_colspan="16"> Length </Td> <Td_colspan="16"> Checksum </Td> </Tr> <Tr> <Th> 20 </Th> <Th> 160 + </Th> <Td_colspan="32"> Data </Td> </Tr> <P> The source and destination addresses are those in the IPv4 header . The protocol is that for UDP (see List of IP protocol numbers): 17 (0x11). The UDP length field is the length of the UDP header and data . The field data stands for the transmitted data . </P>

�total length� field in udp packet header is the length of