Network Basics and Network Abstraction in Linux

Motivation

Before you learn the tools and commands for using the network in Linux you need a basic understanding of how networks work and this unit tries to bring you up to speed quickly.

The ISO-OSI 7 Layer Model

The 7 Layer Model is used to describe networks. The IP Protocol has not been developed within ISO and thus only roughly fits into the mode. Still it is a good picture to have in you mind when you think about networks.

On Top you have your applications. Like e.g. a Web-Browser.