01-Overview

01-Overview - William Stallings Data and Computer...

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Unformatted text preview: William Stallings Data and Computer Communications 8 th Edition Chapter 1 Data Communications and Networks Overview 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 Communications Tasks Transmission system utilization Addressing Interfacing Routing Signal generation Recovery Synchronization Message formatting Exchange management Security Error detection and correction Network management Flow control Simplified Communications Model - Diagram Simplified Data Communications Model 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...
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This note was uploaded on 02/10/2012 for the course CSC 411 taught by Professor Simmons during the Spring '08 term at S. Alabama.

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01-Overview - William Stallings Data and Computer...

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