A 
  comment -802.1Q is really very weak in security if any.
  
    
    
    Folk-
     
    I 
    have created a tutorial on the ISO model for the San Francisco 
    meeting.  Several members of 802.20 have reviewed the 
    presentation.  One comment suggested that I forward a copy of the 
    presentation to the Requirements group.  Please note the comments on 
    the last slide.
     
    Alan