Network Troubleshooting Scenarios

Network troubleshooting is part of daily operations. Technology can and will break. Just when you need that network connection the most, it will fail—hence the need for network troubleshooting. Eliminating the network as the problem is fast and simple once you verify Layer 1, Layer 2, and Layer 3 connectivity. With people, processes, and technology, network troubleshooting can be accomplished. Without visibility into what is happening on the network, network troubleshooting becomes a trial-and-error task.

This section builds upon your knowledge of the OSI model and how it works. Starting at the Physical Layer with link integrity verification, we move up the stack to the Data Link Layer, Network Layer, and ...

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