geepod> yes you did say that in your original post. My point was that the DOD Host-to-host layer has different specifications then the OSI transport layer. Ghost gave a pretty good mapping but used the TCP/IP layer names instead of the DOD names... It should be....
OSI---------------------------DOD
=======================
1Application--------------1Process/
2Presentation------------ Application
3Session------------------
=======================
4Transport----------------2Host-to-host
=======================
5Network-----------------3Internet
=======================
6Data link----------------4Network
7Physical----------------- Access
=======================
The mappings address the same issues. The "Network access" layer of the DOD addresses the physical hardware and the way that the above layers communicate with the hardware, just like the OSI "Physical" and "Data link" layers do. But the actual standards are not the same. So whats my point?
UDP is a TCP/IP protocol which means it follows the DOD standards. It is a host-to-host layer packet. In a true OSI model, UDP would not be allowed because it isn't guaraneed to be error free. If it followed OSI transport layer standards, there would have to be some form of error checking.
