Oh, yes, the good ol' OSI "Layered Communications" model. What are you studying, Blade? Data Communications, or Topology? I'm just finishing up teaching a class on Topology, and then I teach TCP/IP next session (starting next week)...whooboy!
Oh, duh, now I see...you're taking a course on Cisco. "Read the whole post, Saz..."
Fun stuff!
Poor Debiler...need a handkerchief there?
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