阿婆的萬能刀
OSI model - Wikipedia, the free encyclopedia1 History 2 Description of OSI layers 2.1 Layer 1: Physical Layer 2.2 Layer 2: Data Link Layer 2.3 Layer 3: Network Layer 2.4 Layer 4: Transport Layer 2.5 Layer 5: Session Layer 2.6 Layer 6: Presentation Layer 2.7 Layer 7: Application Layer 3 Cross-layer ...
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