Data Communications and Networking

Introduction To Data Communications

                                                                                            Network Management                                                                                       The Three Faces of Networking This topic 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 […]

Data Communications Networks

Data communications is the movement of computer information from one point to another by means of electrical or optical transmission systems. Such systems are often called data communications networks. This is in contrast to the broader term telecommunications, which includes the transmission of voice and video (images and graphics) as well as data and usually […]

Network Models (Data Communications and Networking)

There are many ways to describe and analyze data communications networks. All networks provide the same basic functions to transfer a message from sender to receiver, but each network can use different network hardware and software to provide these functions. All of these hardware and software products have to work together to successfully transfer a […]

Network Standards (Data Communications and Networking)

The Importance of Standards Standards are necessary in almost every business and public service entity. For example, before 1904, fire hose couplings in the United States were not standard, which meant a fire department in one community could not help in another community. The transmission of electric current was not standardized until the end of […]

Future Trends (Data Communications and Networking)

By the year 2010, data communications will have grown faster and become more important than computer processing itself. Both go hand in hand, but we have moved from the computer era to the communication era. There are three major trends driving the future of communications and networking. All are interrelated, so it is difficult to […]

Implications For Management (Data Communications and Networking)

At the end of each topic, we provide key implications for management that arise from the topics discussed in the topic. The implications we draw focus on improving the management of networks and information systems, as well as implications for the management of the organization as a whole. There are three key implications for management […]

Application Layer (Data Communications and Networking)

The Application layer [also called layer 5) is the software that enables the user to perform useful work. The software at the application layer is the reason for having the network because it is this software that provides the business value. This topic examines the three fundamental types of application architectures used at the application […]

Application Architectures (Data Communications and Networking)

In last topic, we discussed how the three basic components of a network (client computer, server computer, and circuit) worked together. In this section, we will get a bit more specific about how the client computer and the server computer can work together to provide application software to the users. An application architecture is the […]

World Wide Web (Data Communications and Networking)

The Web was first conceived in 1989 by Sir Tim Berners-Lee at the European Particle Physics Laboratory (CERN) in Geneva. His original idea was to develop a database of information on physics research, but he found it difficult to fit the information into a traditional data-base. Instead, he decided to use a hypertext network of […]

Electronic Mail (Data Communications and Networking)

Electronic mail (or e-mail) was one of the earliest applications on the Internet and is still among the most heavily used today. With e-mail, users create and send messages to one user, several users, or all users on a distribution list. Most e-mail software enables users to send text messages and attach files from word […]

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