Computer Network and Securities (Understanding the real world scenarios in the basis of Layer by Layer approach)

This book is a walkthrough of all the layers of the ISO OSI model which is a preliminary requirement for a student to understand the world of networking. Traditionally the area of networking has gone drastic changes in accordance with the requirements of the user community. The layering in specific has been modified according to the current requirements. The Chapters in this chapter provide a deep insight into the functionality of the networks along with their services offered to a host of machines. The reader is taken through a step-by-step approach to understand and implement those functionalities in the real world scenario by understanding on a layer to layer basis.
Chapter 1: Introduction
This Chapter introduces computer networks and their applications in the real world scenario. The network types and their structures are discussed. The basic network architecture is presented. The base model of entire networking, the ISO OSI model is discussed in detail. The services offered by various types of networks are also discussed. The TCP/IP protocol is described along with its features and architecture.