Fundamentals of Computer Networks

Fundamentals of Computer Networks

Alireza Salehi Nejad

DEDICATION I dedicate this book to my sister…

Copyright © 2014 Alireza Salehi Nejad All rights reserved. ISBN: 1505354463 ISBN-13: 9781505354461

CONTENTS

Acknowledgments i

SECTION I 1 FUNDAMENTALS OF COMPUTER NETWORKS 1

INTRODUCTION 2 NETWORK TECHNOLOGY 4 HIGH SPEED INTERNET ACCESS 6 Digital Subscriber Line (DSL) 6 Types of DSL 6 How DSL Works 7 Equipment needed for DSL connection 7 Advantages and Disadvantages of DSL 8 DSL Advantages 8 DSL Disadvantages 8 DSL Internet Providers in KL 8 Time Broadband 8 Costs and Speed of Time Broadband 9 The Coverage of Time Broadband 9 Giga Broadband 9 Costs and Speed of Giga Broadband 10 Giga Broadband Coverage 10 TM Streamyx 11 Costs and Speed 11 TM Streamyx Coverage 12 Comparison between the three mentioned service providers 12

Alireza Salehi Nejad

Cable Internet 12 How Cable Internet Works 13 Equipment needed for cable internet connection 14 Advantages and Disadvantages of Cable Internet 14 Cable Internet Advantages 14 Cable Internet Disadvantages 14 Cable Internet Service Providers 14 Satellite Internet 14 How satellite high-speed internet service works 15 Equipment needed for satellite internet connection 16 Advantages and Disadvantages of Satellite Internet 16 Satellite Internet Connection Advantages 16 Satellite Internet Connection Disadvantages 16 Satellite Service Providers in Malaysia 17 SMART Company 17 Broadband over Power Line (BPL) 17 How BPL Works 17 Equipment needed to build up BPL connection 18 Equipment that the provider should install them 18 Equipment that appear to the user 18 Advantages and Disadvantages of BPL 19 Advantages of BPL 19 Disadvantages of BPL 19 BPL Providers in Malaysia 19 Relam BPL Communication 19 Comparison between all types of internet high speed connections 20 Wi-Fi 20 Definition of Wi-Fi 20 Description of the Technologies Involved 21 Importance of Wi-Fi Technology: 21 Wi-Fi Implementation 21 Hardware needed to implement a Wi-Fi network: 21 Software 22 Costs of Implementing Wi-Fi Technology 22 Operational Requirements of Wi-Fi Technology 23 Safety 23 Security 23 Recommended Mechanism for Our Case (Home Network) 25 Rules & regulations for implementing Wi-Fi technology 26 Advantages and Disadvantages of Wi-Fi Technology 27 Wi-Fi Networks Advantages 27 vi

Fundamentals of Computer Networks

Wi-Fi Networks Disadvantages 28 Network Diagram 28

SPIN OFF 30 ALTERNATIVE IN WI-FI: 33 CONCLUSION 35 FAQ 37 Why use wireless 37 What to do when it doesn't work 37 If you are experiencing dropouts 38 Why switch is added to the router 38 Why the printer is connected to PC 38 What network topology I am using and why 39

PART II 40 NETOWKIRNG TWO ORGANIZATIONS 40 INTRODUCTION 41 OBJECTIVES 41 Customer Requirements 41 Design Assumptions 42 Network Design 43 Second Floor LAN Design 45 Third Floor LAN Design 47 Fourth Floor LAN Design 48 Backup Server: 50 Database Server: 50 Software 52 vii

Alireza Salehi Nejad

Firewall 52 Hardware 53 Comparison between Different Topologies 53 Star 55 SNMP (Simple Network Management Protocol) 55 SMTP (Simple Mail Transfer Protocol) 55 LAN Standard (Transmission Method) 56 Broadband Wireless 57 Dial Up 58 Hardware 59 Network Devices 59

SELECTING PROPER PROGRAMMING LANGUAGE 62 Introduction to Visual Basic 62 Introduction to COBOL 62 Java 63 Compiling and Running Java Programs 63

TRANSMISSION MEDIUM 64 Cabling 64 Comparison of Cabling 64 Devices Needed 67

REFERENCES 82 ABOUT THE AUTHOR 86

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ACKNOWLEDGMENTS I would like to express my gratitude to all those who provided support, offered comments, and assisted in the editing, proofreading and design. I would like to thank my parents, my family and friends, for sharing their wealth of knowledge, supporting and encouraging me to gather this booklet. If with chalices of fine wine you are drunk, be delightful! If lounged with a glamorous moonfaced, be delightful! Since the end, the intention of this universe is nonexistence; Thus image your oblivion, and then while you are, be delightful! Arash – Dec 2014

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SECTION I FUNDAMENTALS OF COMPUTER NETWORKS

1

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About the Author Biography... My story... Alireza Salehi Nejad, also known as his pseudonym Arash Titan, is a PersianLiving in various environments and multicultural societies gave me this opportunity Turkish researcher and entrepreneur – the founder and executive director of Titan to learn and get familiar with people representing different cultures, ethos, and Incorporated, a business consulting company headquartered in Kuala Lumpur, Malaysia. principles. Considering that I was studying at a university with international student Arash is an alumnus of Asia Pacific University and Staffordshire University community from over 105 countries and managing a mountaineering club with members Business School, and graduated from Shahid Chamran University with a degree in from over 45 countries with different backgrounds, perspectives, and visions; making Translation Studies. He is currently a postgraduate student of British Studies at team works very challenging. All these led me to know many people and make new University of Tehran, and simultaneously perusing an additional degree in International friends and connections from different parts of the globe, which offered me the Law at IAU. opportunity to learn their languages and become a polyglot. Furthermore, Arash is a peer-reviewer and associate editor of various scholarly I consider good communication skills, strong public relations, and sophisticated journals including American Journal of Industrial and Business Management, Journal of leadership experience as a fundamental key in establishing my business consulting History of Geo- and Space Sciences, Journal of Advances in Journalism and company. Communication, Journal of Advances in Literary Study, Journal of Creative Education, Knowing that today’s tears are the result of the sweats did not pour yesterday, I Open Journal of Leadership worked my way to achieve what I want. In addition to his passion for literature and his many poems, his major research My art, my greatest art, is the skill to live within me. interests are business management, communication skills, interpersonal skills, contrastive literature, critical analysis, and translation studies.

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