Chapter 1: Introduction Business Data Communications, 4e

Information & Communication Networking is critical to the new corporate structures emerging in today’s businesses Benefits of good networks make geographically dispersed companies more manageable help top-heavy companies trim down middle management help companies break down barriers between divisions. Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Trends Driving Data Communication Traffic growth Voice & data; local and long distance Development of new services In turn drives increased traffic Advances in technology Encourage and support increased growth and development Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Key Technology Trends Faster and cheaper computing and communications Increasingly “intelligent” networks Growing importance of Internet, intranet and extranet applications Increasing use of and dependence on mobile technology Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Business Drivers Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Convergence Applications Services Management Infrastructure See figure 1.3 in book for relationship among layers. Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Business Information Requirements Voice communications Data communications Image communications Video communications Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

The Internet & Distributed Applications Key infrastructure for supporting distributed applications Internet, including intranets and extranets TCP/IP protocol suite Distributed applications Client-Server Architectures and Intranets Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Network Types Wide Area Networks Local Area Networks (LANs) Circuit Switched Packet Switched Frame Relay ATM Local Area Networks (LANs) Wireless Networks Metropolitan Area Networks Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Transmission of Information Transmission and transmission media e.g. twisted pair, fiber, wireless, coax Communication Techniques encoding, interface, protocols Transmission efficiency multiplexing, compression Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Management Issues Network Security Network Management Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Communications Standards Importance Process Organizations Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Resources Web Sites Usenet Newsgroups Journals Business-oriented Technical Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0

Telecommunication Uses electricity to transmit messages Speed of electricity dramatically extends reach Sound waves: ~670 mph Electricity: ~186,000 (speed of light) Bandwidth= information-carrying capacity of a channel Stallings, Business Data Communications, Fifth Edition, © 2005 Pearson Education, Inc. All rights reserved. 0-13-144257-0