Abstract : The major goal of this sixth edition is the same as that of the first edition: to go beyond simply providing readers with a handful of new definitions, and instead introduce them to next level of details found within the fields of computer networks and data communications. This higher level of details includes the network technologies and standards necessary to support computer networks systems and their applications. This book is more than just an introduction to advanced terminology. It involves introducing concepts that will help the reader achieve a more in-depth understanding of the often complex topic of data communication. It is hoped that once readers attain this in-depth understanding, the topic of networks and data communications will be less intimidating to them. To facilitate this understanding, the book strives to maintain high standards in three major areas: readability, a balance between the technical and the practical, and currency.In order to keep abreast of the changes in computer networks and data communications, this sixth edition has incorporated many updates and additions in every chapter, as well as some reorganization of sections within chapters.
Here’s a summary of the major changes can be found in each of following chapters:
Chapter One : Introduction to Computer Networks and Data Communications, introduces an update on the many types of computer network connections, along with many of the major concepts that will be discussed in the following chapters, with an emphasis on the TCP/IP protocol suite followed by the OSI models. The topic of convergence has been introduced in this first chapter and will be revisited as needed in subsequent chapters.
Chapter Two: Fundamentals of Data and Signals, covers basic concepts that are critical to the proper understanding of all computer networks and data communications.
Chapter Three: Conducted and Wireless Media, introduces the different types of media for transmitting data. Newer sections on satellite bands and Category 7 wire are included, and the section on cellular telephones was updated to include the latest cell phone technologies.
Chapter Four: Making Connections, discusses how a connection or interface is created between a computer and a peripheral device, with an emphasis on the USB interface.
Chapter Five: Making Connections Efficient: Multiplexing and Compression, introduces the topic of compression. Lossless compression techniques such as runIength encoding are discussed as well as lossy compression techniques such as MP3 and JPEG.
Chapter Six: Errors, Error Detection, and Error Control, explains the actions that can take place when a data transmission produces an error. The concept of arithmetic checksum, as it used on the Internet is included.
Chapter Seven: Local Area Networks: The Basics, is devoted to the basic concepts of local area networks, including the most popular topologies and systems. The local area network switch has been given more prominence, as it is in the current industry.
Chapter Eight: Local Area Networks: Software and Support Systems, discusses the various network operating systems and other network software, with updated material on Microsoft, Linux, the MAC OS X Server, and Novell's version of NetWare.
Chapter Nine: Introduction to Metropolitan Area Networks and Wide Area Networks, introduces the basic terminology and concepts of both metropolitan area networks and wide area networks. An introduction to cloud computing was introduced.
Chapter Ten, The Internet, delves into the details of the Internet, including TCP/IR DNS,a nd the World Wide Web. The discussion on the topic of Voice over IP is included, as well as the material on MPLS, service level agreements, and convergence.
Chapter Eleven, Voice and Data Delivery Networks, provides a detailed introduction to the area of telecommunications, in particular networks that specialize in local and long distance delivery of data. The topics of basic telephone systems and frame relay were reduced to show their diminishing importance in today's technology markets, while the topics of MPLS and VPNs were increased.
Chapter Twelve: Network Security, covers the current trends in network security.
Chapter Thirteen: Network Design and Management, introduces the systems development life cycles, feasibility studies, capacity planning, and baseline studies, and shows how these concepts apply to the analysis and design of computer networks.