How OSI model work in the real world?

Thread Starter

mukesh1

Joined Mar 22, 2020
67
Why we use OSI reference model and how does the OSI model work in the real world?

Let's say I have made a development board which has a microcontroller, inbuilt bluetooth module, wi-fi module and ethernet module.

When i will send data from board to pc via uart with RS232 interface. Does it come in physical layer?

What can I do with my board, which comes in physical layer and data link layer
 

drjohsmith

Joined Dec 13, 2021
376
OSI is a model
a standard that allows us all to talk in the same language ,
with the same boundaries ,

You ask about physical layer
what do you know about the physical layer and the OS model
 

Thread Starter

mukesh1

Joined Mar 22, 2020
67
Seems like you have answered your question
The description of each layer is given in many documents but it is very difficult to understand it from real example.

I really don't understand Why we use OSI reference model and how does the OSI model work in the real world?
 

drjohsmith

Joined Dec 13, 2021
376
The description of each layer is given in many documents but it is very difficult to understand it from real example.

I really don't understand Why we use OSI reference model and how does the OSI model work in the real world?
Like all official specifications
its very verbose

At least now there are many over view docs on line,

e.g.

https://www.forcepoint.com/cyber-edu/osi-model

https://www.computernetworkingnotes...ven-layers-model-explained-with-examples.html

At the end of the day,
the basis is that any layer talks to its same layer, and does not care how the upper or lower layers are handling things,

So if you have an application that talks say session layer, then any session layer will understand it,
no matter what trans port layer it is ,

So TCP/IP packets can be sent over phone lines, radio, satellite, fibre,
the session layer does not care.

Which bit do you not get ?
 
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