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Sunday, September 16, 2012

Introduction 1 - Computer Networks

INTRODUCTION TO NETWORKING


Introduction


This first post will provide an overview about how simple network is built for data communication. Computers connect to networks either by using a modem (external or internal) or a network interface card (NIC). After that we will consider different types of networks available and compare them. Data transmission takes place over some kind of transmission medium. You will also learn about different transmission media commonly in use today. The 4th section will discuss two basic methods of building a network (i.e. client server networking and peer-peer networking) in an office or a work place for resource sharing. 


Data Communication


Data communication is the study of how the digital data is transferred. To put it simply, it is the transfer of bits in serial form outside a computer through a transmission medium such as wires, or electro-magnetic waves. It is important to pay more attention to the word outside, because managing data when it is moving between computers is different to, and harder than, managing it within the computer.