Difference between PUT vs POST from a system administrator POV?

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I believe it’s important to learn concepts from a POV of X, when trying to learn something very confusing that could mean multiple meanings.


These are what I wrote in my college notes of TCP IP that I did 6 years ago.



Much of it is confusing as both seem to be doing the same thing.

Can you tell me what’s the benefit of being idempotent? As far as I know idempotent means no matter how many times you repeat a input, you get same output.