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Learning TCP/IP From the Linux Side: Spec, Code, and Wire
My networking notes used to be full of layer names, header diagrams, and TCP flags. I knew the terminology, but when someone asked what happens after calling send() , my explanation stopped at "the data goes down the stack."
I changed my approach by connecting three things:
The spec: what the RFC defines.
The code: how Linux or C headers represent it.
The wire: what tcpdump or Wireshark captures.
This post applies that approach to four exercises, moving from packe...



