Data communications and networking

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  • As one of the fastest growing technologies in our culture today, data communications and networking presents a unique challenge for instructors. As both the number and types of students are increasing, it is essential to have a textbook that provides coverage of the latest advances, while presenting the material in a way that is accessible to students with little or no background in the field. Using a bottom-up approach,

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  • Data communications and networking are changing the way we do business and the way we live. Business decisions have to be made ever more quickly, and the decision makers require immediate access to accurate information. Why wait a week for that report from Germany to arrive by mail when it could appear almost instantaneously through computer networks? Businesses today rely on computer networks and internetworks.

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  • Lecture Business data communications and networking (8th edition): Chapter 2 - Application layer. In this chapter, the following content will be discussed: Application architectures, world wide web, electronic mail, other applications.

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  • Lecture Business data communications and networking (8th edition): Chapter 4 - Data link layer. In this chapter, the following content will be discussed: Media access control, error control, data link protocols, transmission efficiency.

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  • (BQ) Data Communications and Computer Networks: A Business User's Approach will give you the thorough understanding you need of basic features, operations, and limitations of ifferent types of computer networks. This book offers full coverage of wireless technologies, industry convergence, compression techniques, network security, LAN technologies, VoIP, and error detection and correction.

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  • Chapter 1 - Introduction to data communications. In this chapter, the following content will be discussed: Brief history, data communications networks, network models, network standards, future trends.

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  • Data Communications and Networking, 3/e provides a comprehensive and current introduction to networking technologies. The book is accessible to students from all backgrounds and uses hundreds of figures to visually represent concepts. The new edition has been completely updated to reflect the constantly changing world of network technologies. Enhanced coverage of bluetooth, wireless, satellites, as well as four new chapters on security have been added. The third edition has transitioned from using the 7-layer OSI model to the 5-layer Internet Model.

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  • This chapter addresses four issues: data communications, networks, the internet, and protocols and standards. First we give a broad definition of data communications. Then we define networks as a highway on which data can travel. The internet is discussed as a good example of an internetwork. Finally, we discuss different types of protocols, the difference between protocols and standards, and the organizations that set those standards.

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  • The two dominant networking models are the Open Systems Interconnection (OSI) and the Internet model (TCP/IP).The first is a theoretical framework; the second is the actual model used in today's data communications. In Chapter 2, we first discuss the OSI model to give a general background. We then concentrate on the Internet model, which is the foundation for the rest of the lecture.

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  • Chapter 5 - Network and transport layers. In this chapter, the following content will be discussed: Transport & network layer protocols, transport layer functions, network layer functions, TCP/IP examples.

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  • Chapter 11 - Network security. In this chapter, the following content will be discussed: Introduction; risk assessment; controlling disruption, destruction and disaster; controlling unauthorized access; best practice recommendations.

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  • Chapter 12 - Network design. In this chapter, the following content will be discussed: Introduction: traditional network design, building block network design; needs analysis; technology design; cost assessment; designing for network performance.

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  • Chapter 13 - Network management. In this chapter, the following content will be discussed: Introduction, organizing the management function, configuration management, performance and fault management, end user support, cost management.

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  • One of the major functions of the physical layer is to move data in the form of electromagnetic signals across a transmission medium. Whether you are collecting numerical statistics from another computer, sending animated pictures from a design workstation, or causing a bell to ring at a distant control center, you are working with the transmission of data across network connections. Chapter 3 discusses the relationship between data, which are created by a device, and electromagnetic signals, which are transmitted over a medium.

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  • A computer network is designed to send information from one point to another. This information needs to be converted to either a digital signal or an analog signal for transmission. In this chapter, we discuss the first choice, conversion to digital signals.

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  • Converting digital data to a bandpass analog traditionally called digitalto-analog conversion. Converting a low-pass analog signal to a bandpass analog signal is traditionally called analog-to-analog conversion. In this chapter, we discuss these two types of conversions.

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  • Chapter 6 - Bandwidth utilization: Multiplexing and spreading. In this chapter we will show how we can use the available bandwidth efficiently. We discuss two separate, but related topics, multiplexing and spreading.

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  • After explaining some ideas about data and signals and how we can use them efficiently, we discuss the characteristics of transmission media, both guided and unguided, in this chapter. Although transmission media operates under the physical layer, they are controlled by the physical layer.

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  • Chapter 9 - Using telephone and cable networks for data transmission. This chapter shows how the issues discussed in the previous chapters can be used in actual networks. In this chapter, we first discuss the telephone network as designed to carry voice. We then show how it can be used to carry data. Second, we discuss the cable network as a television network. We then show how it can also be used to carry data.

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  • Chapter 10 - Error detection and correction. This chapter discusses error detection and correction. Although the quality of devices and media have been improved during the last decade, we still need to check for errors and correct them in most applications.

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