Business Data Communications and Networking, 14th Edition presents a classroom-tested approach to the subject, combining foundational concepts, practical exercises, and real-world case studies. The text provides a balanced, well-rounded presentation of data communications while highlighting its importance to nearly every aspect of modern business. This fully-updated new edition helps students understand how networks work and what is required to build and manage scalable, mobile, and secure networks. Clear, student-friendly chapters introduce, explain, and summarize fundamental concepts and…mehr
Business Data Communications and Networking, 14th Edition presents a classroom-tested approach to the subject, combining foundational concepts, practical exercises, and real-world case studies. The text provides a balanced, well-rounded presentation of data communications while highlighting its importance to nearly every aspect of modern business. This fully-updated new edition helps students understand how networks work and what is required to build and manage scalable, mobile, and secure networks.
Clear, student-friendly chapters introduce, explain, and summarize fundamental concepts and applications such as server architecture, network and transport layers, network design processes and tools, wired and wireless networking, and network security and management. An array of pedagogical features teaches students how to select the appropriate technologies necessary to build and manage networks that meet organizational needs, maximize competitive advantage, and protect networks and data from cybersecurity threats. Discussions of real-world management and technical issues, from improving device performance to assessing and controlling costs, provide students with insight into the daily networking operations of actual businesses.
Alan Dennis is a Fellow of the Association for Information Systems and a professor of information systems in the Kelley School of Business at Indiana University. He holds the John T. Chambers Chair in Internet Systems, which was established to honor John Chambers, president and chief executive officer of Cisco Systems, the worldwide leader of networking technologies for the Internet. Alexandra Durcikova is an Associate Professor at the Price College of Business, University of Oklahoma. Alexandra has a PhD in management information systems from the University of Pittsburgh. She has earned an MSc degree in solid state physics from Comenius University, Bratislava, worked as an experimental physics researcher in the area of superconductivity and as an instructor of executive MBA students prior to pursuing her PhD. Alexandra's research interests include knowledge management and knowledge management systems, the role of organizational climate in the use of knowledge management systems, knowledge management system characteristics, governance mechanisms in the use of knowledge management systems, and human compliance with security policy and characteristics of successful phishing attempts within the area of network security. Her research appears in Information Systems Research, MIS Quarterly, Journal of Management Information Systems, Information Systems Journal, Journal of Organizational and End User Computing, International Journal of Human-Computer Studies, International Journal of Human-Computer Studies, and Communications of the ACM. Dr. Jerry FitzGerald wrote the early editions of this book in the 1980s. At the time, he was the principal in Jerry FitzGerald & Associates, a firm he started in 1977.
Inhaltsangabe
About the Authors v
Preface vi
Part One Introduction 1
Chapter 1 Introduction to Data Communications 1
1.1 Introduction 1
1.2 Data Communications Networks 5
1.2.1 Components of a Network 6
1.2.2 Types of Networks 7
1.3 Network Models 8
1.3.1 Open Systems Interconnection Reference Model 9
1.3.2 Internet Model 10
1.3.3 Message Transmission Using Layers 12
1.4 Network Standards 14
1.4.1 The Importance of Standards 14
1.4.2 The Standards-Making Process 15
1.4.3 Common Standards 17
1.5 Future Trends 18
1.5.1 Wireless LAN and BYOD 18
1.5.2 The Internet of Things 18
1.5.3 Massively Online 19
1.6 Implications for Cyber Security 20
Part Two Fundamental Concepts 27
Chapter 2 Application Layer 27
2.1 Introduction 27
2.2 Application Architectures 28
2.2.1 Host-Based Architectures 29
2.2.2 Client-Based Architectures 30
2.2.3 Client-Server Architectures 30
2.2.4 Cloud Computing Architectures 33
2.2.5 Peer-to-Peer Architectures 35
2.2.6 Choosing Architectures 36
2.3 World Wide Web 37
2.3.1 How the Web Works 37
2.3.2 Inside an HTTP Request 38
2.3.3 Inside an HTTP Response 39
2.4 Electronic Mail 41
2.4.1 How Email Works 41
2.4.2 Inside an SMTP Packet 44
2.4.3 Attachments in Multipurpose Internet Mail Extension 45
2.5 Other Applications 45
2.5.1 Telnet 46
2.5.2 Videoconferencing 47
2.6 Implications for Cyber Security 48
Chapter 3 Physical Layer 59
3.1 Introduction 59
3.2 Circuits 61
3.2.1 Circuit Configuration 61
3.2.2 Data Flow 62
3.2.3 Multiplexing 62
3.3 Communication Media 65
3.3.1 Twisted-Pair Cable 65
3.3.2 Coaxial Cable 65
3.3.3 Fiber-Optic Cable 66
3.3.4 Radio 67
3.3.5 Microwave 68
3.3.6 Satellite 68
3.3.7 Media Selection 70
3.4 Digital Transmission of Digital Data 71
3.4.1 Coding 71
3.4.2 Transmission Modes 72
3.4.3 Digital Transmission 73
3.4.4 How Ethernet Transmits Data 74
3.5 Analog Transmission of Digital Data 75
3.5.1 Modulation 75
3.5.2 Capacity of a Circuit 78
3.5.3 How Modems Transmit Data 78
3.6 Digital Transmission of Analog Data 79
3.6.1 Translating from Analog to Digital 79
3.6.2 How Telephones Transmit Voice Data 80
3.6.3 How Instant Messenger Transmits Voice Data 81
