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File:OSIMODELET.png - Wikimedia Commons
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File:OSI Model v1.svg - Wikipedia
Web Science/Part1: Foundations of the web/Internet vs World Wide Web/Summary of the internet architecture/script - Wikiversity
File:Rm-osi parallel.png - Wikipedia
Applied Sciences, Free Full-Text
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File:Tun-tap-osilayers-diagram.png - Wikipedia
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OSI MODEL