User`s guide

Packet Translation Procedure
B-3
Figure B-3. IP Header (After Canonical Packet Format)
Figure B-4. UDP Header (After IP Header)
IP
version
header
length
service type
total length
identification
flags
fragment offset
source IP address
destination IP address
IP options (if any)...
padding
(if necessary)
TTL protocol checksum
UDP source port
UDP destination port
UDP message length
UDP checksum
Ethernet
Frame