OSI model (part-1)

So guys let we introduce with OSI model

   in our previous post we learn about why we need OSI model and what problem we faces without OSI model now we learn what is the OSI model.
   So guys OSI model is protocol that define how the network work. we can think as like its little similar like SNA which launched by IBM, but SNA owner is IBM while OSI is open standard any one can follow it. and make network and do communication by that devices.
OSI model is work is divided in layer. OSI have 7 layer what making communication in devices.The all layer are responsible fro their work. Layers are in this sequence  ↡↡↡

 In  our next post i will describe you the work of layer