Definition
A computer network than spans a relatively large geographical area. WANs are often used to connect two or more networks. The largest WAN is the Internet. (Webopedia, 2000)
Components and characteristics
Type of network
- Public
- Private
Channel
- Dial-up
- Leased line
- Fiber optic
- Microwave
- Satellite
- RF (Radio Frequency)
Hardware
Modem
MOdulator-DEModulator. A device or program that converts a computer's digital data to an analog signal (and vice-versa). Generally modems are used to transmit data over telephone lines.
Multiplexor (MUX)
A device that combines multiple signals for transmission over one channel. Requires a demultiplexor to separate the signal after transmission. Both may be combined in one device to allow both transmission and receiving.
Remote intelligent controller
An intelligent device that allows the host computer to control workstations in either a local or remote environment.
Communications controller
A device attached directly to the host computer bus that manages communications.
Front-end processor
"A small computer managing communications for the host computer in a network." (Laudon & Laudon, 1998, p. G6)
References:
Laudon, K. C. & Laudon, J. P. (1998). Management information
systems: Organization and technology (5th ed.). Upper Saddle River, NJ: Prentice-Hall,
Inc.
Webopedia. (2000, September 24). Available:
webopedia.internet.com (September 24, 2000).
© Copyright 2000 Raymond S. Kulzick. All rights reserved. 000924.
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