The ISO-OSI model of data communication in a more understandable, human interpretation:
Layer 7: Application.
A man or a woman wants to meet a partner.
For the second important reason for being: Sex.
Layer 6: Presentation.
They want to present good. He is dressed nicely in a suit and is shaved. She is wearing a white blouse, tight skirt and hight heels.
Layer 5: Session.
They go to a bar which is known that you can met people there with the same application as you.
They start to chat about the weather, the sign of the zodiac, cars, vacations and more…
Layer 4: Transport.
It is getting late, the bar closes.
He asks her: Can I accompany you home?
She says: Yes.
Now comes the question of transportation. They decide to take the public services: Underground and Bus.
Layer 3: Network.
They have to change twice the metro and then finally take the Bus.
Layer 2: Link.
They arrive at her place.
She asks: Will you come up for a cup of coffee or a drink ?
Of course, he will!
Layer 1: Physical.
…
End of the ‘To better understand the ISO-OSI model’
Copyright H. Aemmerli, Zürich, 15. 8.2014.