What are the rules and standards for graphic representation of IT infrastructure?

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Greetings,
I have always drawn networks, switching, equipment placement in Visio.
Somehow he himself divided the levels of the displayed information on the diagram.
sometimes the schemes turned out to be somehow mixed, but understandable and useful to me))
But I decided to be puzzled and find out if there is any "correct" approach to this issue?
Are there generally accepted standards? Does anyone know or use them?
Links to articles, books are welcome!)
Thank you!