Business Data Communications and Networking by Jerry FitzGerald, Alan Dennis

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Chapter 1. INTRODUCTION TO DATA COMMUNICATIONS

THIS CHAPTER introduces the basic concepts of data communications and shows how we have progressed from paper-based systems to modern computer networks. It begins by describing why it is important to study data communications and how the invention of the telephone, the computer, and the Internet has transformed the way we communicate. Next, the basic types and components of a data communication network are discussed. The importance of a network model based on layers and the importance of network standards are examined. The chapter concludes with an overview of three key trends in the future of networking.

OBJECTIVES ▾

• Be aware of the history of communications, information systems, and the Internet
• Be aware of the applications of data communication 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 three key trends in communications and networking

CHAPTER OUTLINE ▾

• A Brief History of Communications in North America
• A Brief History of Information Systems
• A Brief History of the Internet

DATA COMMUNICATIONS NETWORKS

• Components of a Network
• Types of Networks

• Open Systems Interconnection Reference Model
• Internet Model
• Message Transmission Using Layers

• The Importance of Standards
• The Standards-Making Process .

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