This preview shows page 1. Sign up to view the full content.
Unformatted text preview: -server database system? How is it better
than a conventional database client?
103. What is a distributed database system? What is the main motivation behind
using such a system?
104. What is an active database system? Explain how an active database system
monitors and reacts to specific circumstances of relevance to an applicati
Data Communications and Computer Networks
It is not the processing power of computers, but the power of communication
among computers that has revolutionized the information age. The marriage of
computing and data communication technologies (means and methods by which
data is transferred from one location to another) is one of the most exciting
developments in today's information age. This development has given birth to
computer networks. A computer network is a network of geographically
distributed multiple computers connected in such a way that meaningful
transmission and exchange of information become possible among them. Sharing
of information, sharing of resources (both hardware and software), and sharing of
processing load are some of the major objectives of a computer network.
The goal of this chapter is to introduce the various aspects of data communications
technology and to discuss how this technology is combined with computer
technology to form computer networks. Following are some of the important
concepts, which you will learn from this chapter:
1. Basic elements of a communication system.
2. The techniques, channels and devices used to transmit data between distant
3. The various types of computer networks. 4. Communication protocols, which are rules and procedure for establishing and
controlling the transmission of data from one computer to another.
5. Characteristics and advantages of distributed data processing.
Communication is the process of transferring messages from one point to another.
As shown in Figure 17.1, the three basic elements of any communication process
1. A sender (source), which creates the message to be tran...
View Full Document
This document was uploaded on 04/07/2014.
- Spring '14