Page 123 - DCAP307_PLANNING_AND_MANAGING_IT_INFRASTRUCTURE

Manmohan Sharma , Lovely Professional University
Unit 7: Wireless Networks

Unit 7: Wireless Networks Notes

CONTENTS
Objectives
Introduction

7.1 Wireless Communications Fundamentals
7.1.1 Advantages of Wireless Communications
7.1.2 Disadvantages of Wireless Communications
7.1.3 Types of Wireless Communication
7.2 Cell Phone Services
7.2.1 From Analog to Digital Systems
7.3 Wi-Fi
7.3.1 Features of “Wi-Fi” Technology
7.3.2 Wi-Fi Limitations
7.4 Wi-Max
7.4.1 Advantages of Wi-Max
7.4.2 Disadvantages of Wi-Max
7.5 Summary

7.6 Keywords
7.7 Review Questions
7.8 Further Readings

Objectives

After studying this unit, you should be able to:
 Define the concept of wireless communications
 Identify the types of wireless communication
 Discuss cell phone services in wireless communication
 Explain the concept of Wi-Fi
 Describe the concept of Wi-Max

Introduction

The term “Wireless” came into public use to refer to a radio receiver or transceiver (a dual
purpose receiver and transmitter device), establishing its usage in the field of wireless telegraphy
early on; now the term is used to describe modern wireless connections such as in cellular
networks and wireless broadband Internet. It is also used in a general sense to refer to any type
of operation that is implemented without the use of wires, such as “wireless remote control”,
“wireless energy transfer”, etc. regardless of the specific technology (e.g. radio, infrared,
ultrasonic, etc.) that is used to accomplish the operation. The term wireless network refers to any
kind of networking that does not involve cables. It is a technique that helps entrepreneurs and
telecommunications networks to save the cost of cables for networking in specific premises in
their installations. The transmission system is usually implemented and administrated via

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