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To start troubleshooting a network issue using the divide and conquer method, what is the best layer of the OSI model to begin with?
Network Layer
Application Layer
Data Link Layer
Physical Layer
The network layer is the best layer, as you are then able to know if you need to go up the model or down. If you have layer three connectivity, then you know to move up the model. If you do not have layer three connectivity, then you know to move down the model. There are 3 basic methods for troubleshooting; e.g., [1] bottom-up (OSI Layers), [2]top-down (OSI Layers), and [3]divide and conquer.
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