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Cover image for Understanding Network things: part 1 – L4 / L7 layers

Understanding Network things: part 1 – L4 / L7 layers

Aurélie Vache
Cloud Developer - Google Developer Expert on Cloud - CKAD - Speaker - Sketchnoter - Technical writer - Conferences organizer - "Duchess France" women in tech association Leader - Mentor
・1 min read

Hi,
I've got a secret for you, since several years. I'm a developer and I'm a mess in undestanding network things! :'(

It's hard to not understanding things that anyone seems to understand and understanding network concepts can be difficult or time-consuming, specially for developers. That the reason I started to create sketchnotes about Network concepts. I think it could be a good way, more visual, to explain it.

In this first article, let's talk about L4 and L7 layers and OSI model.

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As usual, if you like theses sketchnotes, you can follow me, and tell me what do you think. I will publish others sketchs shortly :-).

If you are interested, I already published sketchnotes about Kubernetes, Docker and Istio.

Discussion (11)

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fvellozo profile image
Fernao Vellozo • Edited

UDP is another popular protocol that operates in Layer4. So, if you'd like to expand your sketch, you could draw another road for UDP over IP, which in turn could prompt yet another sketch to explain the differences between TCP and UDP.

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Aurélie Vache Author

thanks Fernao, good idea! :-)

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Shrikant Shete

Thank you for explaining and also sketchnotes are very nice..

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Lou (🚀 Open Up The Cloud ☁️)

Short but sweet, I like it! I also constantly mismatch / forget the different layers, thanks for the reminder, Aurélie!

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Aurélie Vache Author

me pleasure :-)
Hope you'll like others articles ^^

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majedfaris profile image
majed L

Very sweet

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Aurélie Vache Author

Thanks Majed ♥️

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csgeek

You should talk about the tcp model as well in comparison to OSI. I believe it has 5 layers instead of the OSIs 7.

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Aurélie Vache Author

Thanks csgeek, I'll think about this point :-)

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Fon Nkwenti

thanks for this.

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Vinay Hegde

People do tend to forget the difference between L4 & L7 inspite of working with it daily so thanks for the excellent visual notes, Aurelie :)