Unformatted text preview: rmed without significant disruption of the
normal functioning of the system.
8. Better flexibility in meeting users' needs. Different types of computers are
usually more suitable for performing different types of computations.
example, computers with ordinary power are suitable for ordinary data processing
jobs, whereas high-performance computers are more suitable for complex
mathematical computations. In a centralized system, the users have to perform all
types of computations on the only available computer. However, a distributed
computing system may have a pool of different types of computers, in which case
the most appropriate one can be selected for processing a user's job depending on
the nature of the job.
Points to Remember
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.
2. The three basic elements of any communication process are a sender (source),
which creates the message to be transmitted, a medium, which carries the
message, and a receiver (sink), which receives the message.
3. The three modes of transmitting data from one point to another are simplex,
half-duplex, and full-duplex. In simplex mode of transmission, communication can
take place in only one direction. A half-duplex system can transmit data in both
directions, but only in one direction at a time. A full-duplex system allows
information to flow simultaneously in both directions.
4. Bandwidth is the range of frequencies that is available for the transmission of
data. The wider the bandwidth of a communication system, the more data it can
transmit in a given period of time.
5. The communication data transfer rate is measured in a unit called baud. In
general usage, baud is identical to bits per second.
6. There are several types of ph...
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This document was uploaded on 04/07/2014.
- Spring '14