Business Data Communications and Networking, 13th Edition

PART ONE INTRODUCTION

CHAPTER 1INTRODUCTION TO DATA COMMUNICATIONS

This chapter introduces the basic concepts of data communications. It describes why it is important to study data communications and introduces you to the three fundamental questions that this book answers. Next, it discusses the basic types and components of a data communications network. Also, it examines the importance of a network model based on layers. Finally, it describes the three key trends in the future of networking.

OBJECTIVES

• Be aware of the three fundamental questions this book answers
• Be aware of the applications of data communications networks
• Be familiar with the major components of and types of networks
• Understand the role of network layers
• Be familiar with the role of network standards
• Be aware of cyber security issues
• Be aware of three key trends in communications and networking

OUTLINE

• 1.1 Introduction
• 1.2 Data Communications Networks
  • 1.2.1 Components of a Network
  • 1.2.2 Types of Networks
• 1.3 Network Models
  • 1.3.1 Open Systems Interconnection Reference Model
  • 1.3.2 Internet Model
  • 1.3.3 Message Transmission Using Layers
• 1.4 Network Standards
  • 1.4.1 The Importance of Standards
  • 1.4.2 The Standards-Making Process
  • 1.4.3 Common Standards
• 1.5 Future Trends
  • 1.5.1 Wireless LAN and BYOD
  • 1.5.2 The Internet of Things
  • 1.5.3 Massively Online
• 1.6 Implications for Cyber Security
• Summary

1.1 INTRODUCTION

What Internet connection should you use? Cable modem or DSL (formally called Digital Subscriber ...