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Encapsulated PostScript  |  1991-05-21  |  84KB  |  421x389  |  16-bit (257 colors)
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OCR: Figure 4 - OSI Reference Model Open System A Open System B Level Layer Protocol (Peer) 7 APPLICATION APPLICATION Vendor Interface 6 PRESENTATION PRESENTATION 5 SESSION SESSION Transport Service 4 TRANSPORT TRANSPORT 3 NETWORK NETWORK NETWORK 2 DATA LINK DATA LINK DATA LINK 1 PHYSICAL PHYSICAL PHYSICAL