# Communication
-------------
---
![](https://camo.githubusercontent.com/1d761d5688d28ce1fb12a0f1c8191bca96eece4c/687474703a2f2f692e696d6775722e636f6d2f354b656f6351732e6a7067) 
[Source: OSI 7 layer model](http://www.escotal.com/osilayer.html)