itft_Data communication

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Information about itft_Data communication
Education

Published on April 26, 2014

Author: SwatiAggarwal15

Source: slideshare.net

Description

Data communication is used to exchange or sharing the data between the devices.

DATA COMMUNICATION

A Communications Model • Source • generates data to be transmitted • Transmitter • Converts data into transmittable signals • Transmission System • Carries data • Receiver • Converts received signal into data • Destination • Takes incoming data

Business Data Communications Issues • Major data communications issues include: • Cost-effectiveness • The Internet • Bandwidth • Evolving technologies • Convergence • Standards • Privacy and security

Simplified Communications Model - Diagram

Simplified Data Communications Model

Business Data Communications Issues • Major data communications issues include: • Cost-effectiveness • The Internet • Bandwidth • Evolving technologies • Convergence • Standards • Privacy and security

Networking • Point to point communication not usually practical • Devices are too far apart • Large set of devices would need impractical number of connections • Solution is a communications network • Wide Area Network (WAN) • Local Area Network (LAN)

Wide Area Networks • Large geographical area • Crossing public rights of way • Rely in part on common carrier circuits • Alternative technologies • Circuit switching • Packet switching • Frame relay • Asynchronous Transfer Mode (ATM)

Local Area Networks • Smaller scope • Building or small campus • Usually owned by same organization as attached devices • Data rates much higher • Usually broadcast systems • Now some switched systems and ATM are being introduced

Metropolitan Area Networks • MAN • Middle ground between LAN and WAN • Private or public network • High speed • Large area

Networking Configuration

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