Monday agenda: (0) collect homework (1) on-line assessment demonstration (2) review OSI model, refer to 20091005.txt, OSImodel.doc and PDU.doc (3) We will again use about 100 minutes to lecture. You are encouraged to preview chapter 6. (4) homework for Wednesday discussion modification from last class: Add a horizontal line above BGP in the picture/note of OSI 7-layer Model. Add key words for the layers: (4) reliability, segment, sequence, PAR, acknowledgement (3) routing address, network addressing, network mask, IP (2) MAC, frame, neighborhood, point-to-point, encapsulation (1) bit, signal, physical properties and standards