Powerpoint Templates Lecture 1 Computer Communication and Networks.

Powerpoint Templates

Lecture 1

Computer Communication and Networks


Goals Of This Course

Upon successful completion of the course the student will be able to:

ϞAnalyse the components of data communication (DC).ϞIdentify and compare the functions and requirements of data communication.ϞDistinguish between the different functions in a data communication and demonstrate their uses.ϞDemonstrate how to set up a communications network for different business and social entities.ϞDiscern the differences between the different types of networks and other forms of data communications.ϞInvestigate the use of the Internet in researching information dealing with data communications.


Course Overview

Topics that we are planning to cover:

ϞFundamentals of data communicationsϞData transmission basicsϞAnalog & digital communications ϞCommunication media and equipmentϞModulation schemesϞData encoding schemesϞTransmission ModesϞSpread spectrumϞSwitched circuitsϞMultiplexingϞError detection and correctionϞError control and flow controlϞSecure communication systemϞTransmission MediaϞWired & Wireless NetworkϞISP setup


Course Overview

Text:Ϟ“Data and Computer Communication” 7th Edition by William StallingsϞ“Data Communications and Networking” 4th Edition by Behrouz A. Forouzan


Introduction

Definition Of Data Communication“Data Communication is the exchange of information from one entity to the other using a transmission medium”.

As you can clearly notice, the definition of Data Communication although simple, leaves many questions unanswered:

Exchange ??????Information ?????Entities ???????Transmission ????Medium ????

We will try to answer all these questions in this course


History of Data Communication

Telegraph 1837 Samuel MorseTelephone 1876 Alexander Graham Bell

1970’s:Although development of databases, languages, operating systems, and hardware was strong from 1950s to 1970s, large-scale data communication systems did not emerge until the 1970s.

This was stimulated by 3 major developments:

ϞLarge-scale integration of circuits reduced cost and size of terminals and communication equipmentϞNew software systems that facilitated the development of data communication networksϞCompetition among providers of transmission facilities reduced the cost of data circuits


History of Data Communication

TODAY’S EVERCHANGING & BUSY WORLD

ϞToday’s fast world demands better, secure and most of all FAST ways of communicationϞGone are the days when you had to wait a couple of weeks to get a letter from USA

ϞWhy wait ONE week when you can get the information you require in just a split of a second, using what we know by the name of “Data Communication”.


Definition Of Data Communication

DATA COMMUNICATION

ϞWhen we communicate, we share informationϞInformation can be LOCAL or REMOTEϞBetween individuals LOCAL communication occurs face to faceϞREMOTE communication occurs over a long distance

ϞWhen we refer to computer systems, data is represented in the form of binary units (Bits) i.e. in the form of zeros (0’s) and one’s (1’s)ϞAlso the entities can most of the times be considered to be computers


Definition Of Data Communication

Therefore , our earlier definition can easily be modified to:

“Data Communication is the exchange of data (in the form of 0’s and 1’s) between two devices (computers) via some form of the transmission medium.”

Powerpoint Templates Lecture 1 Computer Communication and Networks.

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