# Intro

* It is a 7 layer architecture with each layer having specific functionality to perform. 
* All these 7 layers work collaboratively to transmit the data from one person to another across the globe.

![ISO](https://1771079106-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MQbAc68qKpvpcr7cwG8%2F-MRxpof5OJChqlhLtuOF%2F-MRxqXl1cUmozAz71u2f%2FISo.jpg?alt=media\&token=5715279e-faba-4d8e-a84a-02633a2ded3a)

![](https://1771079106-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MQbAc68qKpvpcr7cwG8%2F-MRxmHx_DdCUporEpxSD%2F-MRxn4ruI_qOrzcMf30U%2FScreenshot%20\(185\).png?alt=media\&token=35c7700d-ccdb-41bb-8bb4-0a065ec0a989)