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In networking terms, the little well-known eighth layer of the OSI reference model. Layer 8 -> Chicken Parm Layer 7 -> Application Layer 6 -> Presentation Layer 5 -> Session Layer 4 -> Transport Layer 3 -> Network Layer 2 -> Data Link Layer 1 -> Physical Normally, during troubleshooting procedures, a problem can be broken down and categorized into one of the lower seven layers. When an issue is of an unknown origin, cannot be resolved, nor can it be explained, it becomes a layer 8 issue, and is pushed aside as unsolvable.
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