ran across this while reading up on wireless standards http://boole.computer.org/itpro/homepage/May_Jun01/stall/04.htm#fig3 keep that OSI model in mind! Chuck Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=11177&t=11177 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]