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Sams Teach Yourself Network Troubleshooting in 24 Hours, Second Edition by Jonathan Feldman

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Summary

This hour is a reasonably complete introduction to most of the networking concepts you’ll run into. However, as they say, the devil’s in the details. This hour provides a good foundation on which you can build your troubleshooting knowledge as you read on.

Here are some things to remember:

  • A network card acts as your computer’s telephone to the outside world. Also, it has its own unique identifier (MAC address) built in to it.

  • Some LANs are based on a shared bus (hub) or “party line.” As with real party lines, hurt feelings and even major disasters are caused by those who talk out of turn.

  • In modern networks, NICs are connected via switches for local communication— these local networks are called VLANs.

  • A router is used to route packets ...

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