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by whatupmd 2656 days ago
OSI model is very useful mental model for troubleshooting networking issues. Having a frame-work for where in the stack a protocol lies allows you to verify and eliminate lower-level protocols as a culprit.
1 comments
zamadatix 2656 days ago
The OSI model is a poor model for a world built on the 4 layer TCP/IP model.
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vvanders 2656 days ago
Not all the world is TCP/IP.

If you ever spend any time with more than your standard wifi + NAT connection understanding L2 vs L3 vs L4 becomes very handy.

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zamadatix 2655 days ago
The TCP/IP model includes L2 vs L3 vs L4 (i.e. it's not limited to modeling just the TCP/IP portion it is named after), it doesn't include the rest of the cruft the OSI model does nor any expectations on how those layers were supposed to tie together (which never happened the way OSI laid things out anyways).
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