6 Replies Latest reply: Jul 21, 2009 1:42 PM by chemilio RSS

    Frame relay - which OSI layer ?


      Hi everyone,

      I was under the impression that frame relay operates strictly under the data link layer of OSI model.

      But now that i've researched over the net I get mixed results where some sources

      include  frame relay in the physical layer as well. What would you answer if you came

      accross such question in CCNA?