Linux › Section I · Your network and its configuration › Topic I.1
Network basics, packets, and layers
Before you can configure a Linux machine's network, you need a clear picture of what it is joining and which part of the system handles each job. This topic maps the familiar network layers onto Linux itself: what the kernel does, what user programs do, and which command shows you each piece.
In this topic
- A Linux machine on a small network
- Packets: header and payload
- The layers, Linux style
- Who does what: kernel and user space
- A command for each layer
- Worked example: one web request on a Linux laptop
- Worked example: naming the layer from the output
- When layers blur
- A router is just a computer
- Common mistakes to avoid
- Key takeaways
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