Network models and protocols.

OSI model: 

The Open Systems Interconnection (OSI) model is a conceptual model created by the International Organization for Standardization which enables diverse communication systems to communicate using standard protocols.

 Lets discuss in structural mode of OSI:

To know more about please read the book , which we have provided you.

You may also check this : Details about OSI model.

 

All the concept in one package :) TCP/IP , TCP, UDP , Let's open the website.