Difference between IPoIB and Native Infiniband

Great, short and "straight to the point" explanation of the main differences between Native Infiniband and IPoIB protocol:

• http://stackoverflow.com/a/6079696

For some detailed resources you should definitely check(you wouldn't be surprised that two of the top three Google results are here,would you...??):

• Ali Ayoub's presentation: click me
• IPoIB Linux Implementation: click me