This book presents networking concepts with a “practical” approach. It backs technical concepts and information with relevant applications in the business and education worlds, providing learners with a “context” to understand the material. A five-part organization includes an introduction and sections on data communications, communications networks, internetworking, and network management. For a variety of jobs in the fields of electronic and computer technology.
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Computer Networking is a comprehensive introduction to the rapidly changing world of wired and wireless computer interconnection. Designed as an introductory course in networking, the book is also an excellent reference source. It is easy to understand and contains an extensive glossary, acronym list, and index, which makes finding material on particular topics easy. The book is targeted for the individual who has little background in networking, other than what can be gained by reading business and popular press or by using a PC at home, school, or work. This text neither assumes nor expects that the reader has a background in programming or advanced computer technology.
The specific objectives of the text are:
Computer Networking is organized into five sections that group topics for ease of teaching and learning. Part One presents introductory material that lays the foundation and provides a framework for the more detailed material in subsequent chapters. Chapter 1 introduces the subject matter and provides an overview of networking concepts. Chapter 2 describes and illustrates several ways of classifying networks, many of which will already be familiar to readers. Chapter 3 introduces and explains the OSI model for networks and the TCP/IP architecture that is the foundation of the Internet and many contemporary networks. The importance of network standards is also explained, and the need for both network architectures and standards is discussed. Chapter 4 introduces protocols, the "rules of the road" for networks. The need for protocols is explained, and the basic components that make up a protocol are examined.
Part Two delves into the fundamental technology that underlies all telecommunications and networking, and provides the technical foundation for networks. Chapter 5 examines how data are coded for transmission on a network. Readers learn the requirements for a good coding system and the reasons certain codes are more appropriate than others for use on telecommunications networks. Chapter 6 describes analog and digital signals, transmission methods, and the way they are combined in various network systems. Four cases are studied: transmitting analog signals on analog circuits; analog signals on digital circuits, digital signals on analog circuits, and digital signals on digital circuits. The reasons why digital transmission is superior to analog transmission are explained. Chapter 7 describes the protocols that are used on data links. Several protocols are examined in detail, and many more are introduced. Both LAN and WAN protocols are emphasized. Chapter 8 examines the media used for circuits that make up a network. The attributes of each medium are studied and compared, and the advantages and disadvantages of selecting one medium over another for a particular application are studied and discussed. Chapter 9 describes communications circuits. Various types of analog and digital circuits are studied. Circuit switching, packet switching, and multiplexing are explained. The types of errors that can occur on a circuit and the way in which errors are detected and corrected are examined in detail.
Part Three examines networks in detail. LANs are studied first, followed by WANs. Chapter 10 examines the technology used for LANs. Various topologies, access control techniques, protocols, and routing techniques are explained. Chapter 11 looks at the way the technologies are combined to make LANs such as Ethernets and token rings. Wireless networks, in their many forms, are examined in detail. The intricacies and limitations of the technologies of real-world networks are covered. Chapter 12 examines the requirements for installing, operating, and managing a LAN. The need for LAN management and security is explained. The issues surrounding home networks are explored. Many of the principles in this chapter apply to WANs as well. Chapter 13 describes WANs and examines their topologies. Packet data networks and the way traffic is routed in a WAN are explained. Broadband networks are studied, and specific WAN systems, such as frame relay and ATM, are explained.
Part Four deals with the ways in which networks of all types are interconnected into internets. Chapter 14 looks at the technology required to interconnect networks that may be fundamentally different in design. TCP/IP, as well as domains and domain naming, are examined in detail. Tools that are useful in managing an internet are also introduced. Chapter 15 relates the history and technology of the Internet and the WWW, which have both become so pervasive throughout society in the past several years. Various ways to connect to the Internet are described. Chapter 16 presents various Internet applications such as e-mail and Internet telephony. Specifically, those of the WWW and the technologies that underlie its operation are explored. Browsers are introduced, and an explanation of how to create Web pages is given. Other Internet tools, such as FTP and Telnet, are also explained.
Part Five examines network security, network design, and network management. Chapter 17 covers the important topic of network security in detail. Network access control is described, and various techniques for implementing security are examined. Encryption is explained, and the importance of personnel and physical security is described. Security for home networks is also studied. Chapter 18 describes the process of designing and implementing new networks or changes to existing networks. Each phase of network design and implementation is discussed in detail. Chapter 19 examines techniques for operating and managing networks. The need for managing networks is first explained. Problem management, performance management, change management, and configuration control are described. Various types of management reporting of network operations are shown.
Computer Networking contains many pedagogical features designed to assist both students and instructors.
For instructors, there is a comprehensive Instructor's Manual that includes:
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