DATA COMMUNICATION Computer Communications Networks Introduction Computer Communications

DATA COMMUNICATION : Computer Communications Networks - Introduction

Computer Communications Networks - Introduction The purpose of a computer communications network is to allow moving information from one point to another inside the network. The information could be stored on a device, such as a personal computer in the network, it could be generated live outside the network, such as speech, or could be generated by a process on another piece of information, such as automatic sales transactions at the end of a business day. The device does not necessarily have to be a computer; it could be a hard disk, a camera or even a printer on the network. Due to a large variety of information to be moved, and due to the fact that each type of information has its own conditions for intelligibility, the computer network has evolved into a highly complex system. Specialized knowledge from many areas of science and engineering goes into the design of networks. It is practically impossible for a single area of science or engineering to be entirely responsible for the design of all the components. Therefore, a study of computer networks branches into many areas as we go up from fundamentals to the advanced levels.

Computer Communications Networks - Introduction Advancements in communication of speech have long been matured in the form of public switched telephone network (PSTN). However, design of store-and-forward type of networks, such as the Internet, is far from matured - perhaps due to proliferation of the ways in which such networks are used. The integration of the two types of networks is the culmination of telecommunications technology. It is not futuristic to imagine telecommunications networks meeting the needs of live traffic (e. g. , phone calls) as well as store-and-forward data (e. g. , email) traffic according to the desired quality of service. we look at a computer network as a whole, from both an application point of view and a design point of view. In fact, the design and application influence each other so much that a study of the fundamentals is practically impossible by leaving either one out.

REFERENCES • Ahmad A. - Data Communication Principles. For Fixed and Wireless Networks • Cornelius T. Leondes - Database and Data Communication Network Systems, Three-Volume Set_. . -Academic Press